School Districts Don't Match Zip Codes: How to Verify Which Schools Your Property Actually Feeds Into

If you are relocating to the Texas Hill Country with school-age children, one of the most important facts you need to understand before making an offer is this: ZIP codes do not determine school districts. A home listed as being in "Boerne, TX 78006" might feed into Boerne ISD , or it might not. The same is true for Fair Oaks Ranch, Comfort, Spring Branch, and several other communities where district boundaries crisscross postal codes, city limits, and even county lines. I have seen buyers assume they were buying into an A-rated school district based on the listing address alone, only to discover after closing that their property feeds into a different district entirely. That kind of surprise is avoidable , but only if you know how to verify the information before you commit.

Why ZIP codes and school districts do not align in Texas

In Texas, school districts , officially called independent school districts (ISDs) , are their own governmental entities. They have independent boundaries that are drawn by the state and can change over time through legislative action or annexation. ZIP codes, on the other hand, are USPS postal delivery routes. They have no relationship to school attendance zones, city boundaries, or county lines [1].

A single ZIP code in the Hill Country can contain properties that feed into two or three different school districts. Conversely, a single school district can span multiple ZIP codes. The TEA's School District Locator confirms that district boundaries are determined by specific property addresses, not by ZIP code, city name, or county of residence [2].

This matters in the Hill Country corridor because the boundaries are particularly complex. Consider these real-world scenarios:

The takeaway: never assume a school district based on the listing agent's city reference, the ZIP code, or even the county. The only reliable method is to check the property address against the official school district boundary data.

How to verify which district a property actually feeds into

There are three reliable methods, and I recommend using at least two of them before you go under contract:

Method 1: The TEA School District Locator. The Texas Education Agency provides an official online School District Locator at tea.texas.gov that allows you to enter a property address and determine which ISD serves that location [2]. This is the authoritative source , the same data the state uses for accountability ratings and funding calculations. Use this as your primary verification tool.

Method 2: The county appraisal district. Every property in Texas is appraised by a county appraisal district , Kendall County Appraisal District for Boerne-area properties, Bexar County Appraisal District for San Antonio-area properties, and so on. The appraisal record includes the school district designation. This is useful because the appraisal district data is tied to the specific parcel, not just the address [3].

Method 3: Direct contact with the school district. Call the enrollment or attendance office of the ISD you believe serves the property. Provide the specific street address, and they will confirm whether the property is within their boundaries. This is the most direct method and eliminates any ambiguity from the other two sources.

I run all three checks for every client with school-age children. It takes about 15 minutes and eliminates the single most common school-related surprise in Hill Country transactions.

Feeder patterns: the next layer of complexity

Even within a confirmed school district, the specific school your child attends depends on the feeder pattern , the internal attendance zone map that determines which campus serves which addresses. A single ISD can have multiple elementary schools, multiple middle schools, and one or more high schools, each with distinct attendance boundaries [1].

In Boerne ISD, for example, the two primary high schools are Boerne High School and Boerne , Samuel V. Champion High School (commonly called Champion High). Both are well-regarded, but they serve different geographic areas of the district. A property on the north side of Boerne might feed into Boerne High School, while a property in Fair Oaks Ranch feeds into Champion High. Both campuses carry the district's A-rated TEA score, but they are distinct campuses with different campuses, programs, and community cultures.

Feeder patterns matter because they affect your daily logistics , which school your child attends, where they catch the bus, and which campus activities you participate in. The feeder pattern is not always obvious from the district-level designation. You need to check at the campus level.

Why GreatSchools ratings can mislead relocating buyers

GreatSchools is the most commonly referenced school rating platform in real estate listings. It is also one of the most frequently misunderstood. Here is why.

GreatSchools ratings are primarily test-score driven. The platform's 1-10 rating is calculated primarily from student achievement on standardized tests, with smaller weight given to test score growth over time and equity metrics (how well the school serves disadvantaged students) [4]. What the rating does not measure: extracurricular breadth, teacher retention, campus culture, special education services, gifted programs, arts and athletics, class size, or parent satisfaction. A school rated 7/10 may have a stronger community and more program options than a school rated 8/10 , but the number does not tell you that.

Scale matters more than the number. A GreatSchools rating of 7/10 in a small rural district (Comfort ISD, ~800 students) reflects a very different reality than a 7/10 in a large urban district (Northside ISD, ~99,700 students). In a small district, one or two students' scores can shift the rating meaningfully. In a large district, the rating is an average across dozens of campuses with vastly different demographics, resources, and outcomes. Comparing raw GreatSchools numbers across districts of different sizes is like comparing batting averages across different leagues , the number is the same, but the context is not.

TEA ratings tell a different story. The Texas Education Agency's accountability rating system evaluates schools and districts on a broader set of measures: student achievement, school progress, and closing the gaps [5]. Boerne ISD's six consecutive A ratings from the TEA reflect consistent performance across all three domains. A school can have a GreatSchools 7/10 and a TEA A rating , or a GreatSchools 8/10 and a TEA C rating , because the two systems measure different things. For relocating families, I recommend using TEA ratings as the primary reference and GreatSchools as supplementary context, not the other way around.

Ratings change year to year. Both GreatSchools and TEA ratings are updated annually. A rating that was an 8 last year might be a 7 this year , not because the school changed, but because the cohort of students changed, the testing standards shifted, or the weighting formula was adjusted. Do not make a $500,000+ housing decision based on a single year's rating. Look at the three-year trend, which gives a much more reliable picture of consistency.

Boerne ISD: the district that draws families north

Boerne ISD is the primary school district serving the communities of Boerne, Fair Oaks Ranch, and the surrounding Kendall County corridor. It is the district that drives the most relocation interest in the Hill Country , and for good reason.

The district serves approximately 11,000 students across 13 campuses , nine elementary schools, four middle schools, and two high schools (Boerne High School and Champion High School). It has earned an A rating from the TEA for six consecutive years, with STAAR test scores consistently above regional and state averages. In 2025, 91 percent of Boerne ISD students scored at Approaches Grade Level or above on STAAR assessments, compared to approximately 83 percent statewide [6]. The four-year graduation rate is 98.3 percent , well above the state average of approximately 90 percent [7].

Boerne ISD's school tax rate of $0.9909 per $100 of assessed value for the 2024-2025 school year reflects six consecutive years of tax rate reductions [8]. For a $500,000 home with the $140,000 homestead exemption, the school district tax portion comes to approximately $3,574 per year , competitive for an A-rated district in the San Antonio metro area.

For families relocating from California, where top-rated public school districts are often located in the most expensive zip codes, Boerne ISD offers a different value proposition: an A-rated school system with home prices ranging from the mid-$300,000s to well above $1 million, in a setting that includes Hill Country views, larger lots, and lower overall housing costs than comparable California districts. The trade-off is the commute , properties in Boerne are 30 to 45 minutes from most San Antonio employment centers , and the lifestyle shift to well water, septic, and propane on many properties outside the municipal water service area. Our Boerne community guide covers these infrastructure realities in detail.

Comfort ISD: small-town education with trade-offs

Comfort ISD is a small, rural district serving the town of Comfort and surrounding areas in Kendall County. With roughly 800 students total, it is a fraction of Boerne ISD's size. The intimacy is both the draw and the limitation.

The TEA rated Comfort ISD a C in the most recent accountability cycle, with an overall score of 78 , just below the B threshold [5]. The district's graduation rate is an impressive 99 percent, reflecting the close-knit community's engagement. However, academic proficiency metrics, particularly in mathematics, trail state averages significantly. One reporting source indicates math proficiency (at the Meets Grade Level standard or above) at approximately 10 to 14 percent, compared to a statewide average of roughly 44 percent [9]. GreatSchools rates Comfort High School at 5/10 [4].

For families prioritizing small class sizes, community intimacy, and a rural lifestyle, Comfort ISD has real appeal. Students know their teachers, parents are deeply involved, and the campus culture reflects a genuine small-town bond. For families where academic rigor and college preparation metrics are the primary decision factors, the data suggests Comfort ISD's performance does not match Boerne ISD's , and the housing price differential often does not reflect that gap.

The property tax picture is also relevant. Comfort ISD's tax rate is estimated at approximately $1.04 per $100 of assessed value , slightly higher than Boerne ISD's $0.9909, despite the lower TEA rating. School tax rates in Texas are driven by district spending needs and state funding formulas, not by academic performance. A higher tax rate does not guarantee a higher-rated school.

Northside ISD: the large-district alternative

Northside ISD is the largest school district in the San Antonio area and one of the largest in Texas, serving approximately 99,700 students across more than 120 campuses [10]. It covers a vast geographic area including much of northwest San Antonio and extends toward the I-10 corridor heading toward Boerne.

This is where the boundary complexity becomes most acute for Hill Country buyers. A property with a Boerne mailing address, a Boerne ZIP code, and Hill Country surroundings may actually sit within Northside ISD boundaries , particularly if the property is on the Bexar County side of the I-10 corridor. The mailing address says Boerne. The school district says Northside ISD.

Northside ISD received a C rating from the TEA in the most recent cycle , the third consecutive year at that level, with an overall score of 75 [11]. The district's school tax rate is $1.0049 per $100 of assessed value [12]. With nearly 100,000 students, performance varies significantly by campus. Some Northside ISD schools score in the A and B range; others struggle at D and F levels. The district-level C rating averages these extremes together, which means the district-level number is less useful than the individual campus rating for any specific property.

For buyers, the critical issue is not whether Northside ISD is a "good" or "bad" district , it is whether the specific campus serving your address aligns with your priorities. A property in the far northwest reaches of Northside ISD, near the Boerne border, may feed into a high-performing campus with scores comparable to Boerne ISD. The same buyer's child, attending a different Northside campus 20 minutes south, may have a very different experience.

The tax rate question: what your school district actually costs you

School district taxes are the single largest component of your annual property tax bill in Texas. The district's tax rate , expressed as a dollar amount per $100 of assessed value , directly determines how much you pay. And the rates differ between districts.

For a $500,000 homesteaded property (taxable value of $360,000 after the $140,000 school district exemption):

The annual difference between Boerne ISD and Comfort ISD on this scenario is roughly $177. Not dramatic in isolation. But the difference between the highest and lowest-rated district in this comparison is significant , and the tax rate favors the higher-rated district. This is one of those situations where the better school also happens to cost less in property tax, which is not always the case in Texas but is the current reality in this corridor.

For a complete property tax analysis including county, city, and special district levies, see our Property Tax Reality Check article.

What relocating families should actually prioritize

After helping dozens of California-to-Texas families navigate school district decisions, here is what I have learned matters most:

Verify, then trust the verified data. Do not make a housing decision based on a listing description, a realtor's offhand comment about "great schools," or a GreatSchools number you saw on Zillow. Check the TEA rating at txschools.gov, confirm the feeder campus, and then evaluate the campus-level data. The five-step verification process above takes less than an hour and eliminates the most consequential uncertainty in the transaction.

Look at the campus, not just the district. A district-level rating (whether TEA or GreatSchools) is an average. Large districts like Northside ISD contain both outstanding and struggling campuses. If you are evaluating a property in a large district, identify the specific campus serving that address and evaluate it independently.

Consider the trajectory, not just the snapshot. A district or campus that has improved its rating over three years may be on a stronger upward trajectory than one that has been flat at a slightly higher level. Boerne ISD's six consecutive A ratings demonstrate consistency , the district is not volatile, and families who move there for the schools are unlikely to see a sudden drop in quality.

Tax rate matters, but it should not drive the decision. The annual difference between the highest and lowest school tax rates in this comparison is a few hundred dollars on a $500,000 home. The difference in educational outcomes, campus culture, and your child's daily experience is considerably larger. Make the school decision on quality; optimize the tax bill through exemptions and protest strategies.

Ask about programs, not just scores. Special education services, gifted and talented programs, ESL support, career and technical education (CTE) pathways, athletics, and arts programs vary significantly between districts , and none of them show up in a GreatSchools rating. If your child has specific needs or interests, the campus-level conversation with the school is more valuable than any online metric.

I help families evaluate school districts as part of every Hill Country relocation consultation. The analysis is property-specific , the answer depends on where you are buying, what your children need, and what you value. No generic rating system captures all of that.

Frequently asked questions

How do I find out which school district my property is in?

Use the TEA School District Locator at tea.texas.gov , enter the specific street address and it will return the official ISD designation. You can also check the county appraisal district record for the property, which includes the school district. For absolute confirmation, call the enrollment office of the ISD you believe serves the address and provide the property's street address [1][2].

Can a home with a "Boerne" address be in a different school district?

Yes. The city of Boerne sits primarily in Kendall County, but portions of the Boerne mailing area extend into Bexar County, where some properties fall within Northside ISD boundaries rather than Boerne ISD. ZIP code 78006 covers a wide geographic area with properties in multiple jurisdictions. The mailing address and the school district are independent of each other [2].

Are GreatSchools ratings reliable for comparing Texas schools?

GreatSchools ratings are a useful starting point, but they are primarily test-score driven and do not measure programs, campus culture, class size, or parent satisfaction. They also use a standardized 1-10 scale that does not account for district size , a 7/10 in a 800-student district represents a very different reality than a 7/10 in a 100,000-student district. Use GreatSchools as supplementary context, and rely on the TEA accountability system as your primary reference [4][5].

What does the TEA accountability rating actually measure?

The TEA rating evaluates schools and districts on three domains: student achievement (how much students know), school progress (how much students improved year over year), and closing the gaps (how well the school serves all student groups). A district earns an A, B, C, D, or F based on a composite score across all three domains. Boerne ISD's six consecutive A ratings reflect consistent performance across all measures, not just raw test scores [5].

Does a higher school tax rate mean a better school?

No. School tax rates in Texas are determined by a district's spending needs and state funding formulas , not by academic quality. In the Hill Country corridor, Comfort ISD's estimated tax rate of approximately $1.04 per $100 is higher than Boerne ISD's $0.9909 per $100, despite Boerne ISD's significantly higher TEA rating. The tax rate tells you what the district costs; the TEA and GreatSchools ratings tell you what the district delivers. Evaluate both, but do not conflate them [8][9].

Should I choose a home based on the school district?

For families with school-age children, the school district is one of the most impactful factors in both daily quality of life and long-term property value. Homes in A-rated districts like Boerne ISD tend to appreciate faster and hold value more reliably during market downturns than comparable homes in lower-rated districts. However, the school decision should be made alongside commute tolerance, infrastructure preferences (well water vs. municipal), lot size, and budget. No single factor should drive the entire decision , but for many families, the school district is the factor that narrows the search most effectively.

Sources

1. Texas Education Agency , School District Locator FAQ. Explanation of how ISD boundaries are independent of ZIP codes, city limits, and county lines; district boundaries are determined by specific property addresses. tea.texas.gov
2. Texas Education Agency , School District Geographic Data and Locator Tool. Official tool for verifying which ISD serves a specific property address; authoritative state source for district boundary data. tea.texas.gov
3. Kendall County Appraisal District , Property Records. Property tax records include school district designation; useful for cross-referencing TEA locator results with the county's parcel-level data. kcad.org
4. GreatSchools.org , Rating Methodology. School ratings based primarily on student achievement on standardized tests, with smaller weight on test score growth and equity metrics; does not measure programs, culture, or class size. greatschool.org
5. Texas Education Agency , School Accountability Ratings (2024-2025). TEA ratings based on student achievement, school progress, and closing the gaps; A through F scale. Boerne ISD A-rated (6th consecutive year); Comfort ISD C (score 78); Northside ISD C (score 75). txschools.gov
6. Community Impact , Boerne ISD Test Averages (2025). Boerne ISD students scored 91% at Approaches Grade Level or above on STAAR, compared to ~83% statewide. communityimpact.com
7. Boerne Star , Boerne ISD Graduation and Performance Data. 98.3% four-year graduation rate; average SAT score 1072; average ACT score 24.0. boernestar.com
8. Boerne ISD , 2024-2025 Published Tax Rate. Combined school district tax rate of $0.9909 per $100 of assessed value; sixth consecutive year of tax rate reductions. boerneisd.net
9. Public School Review / HAR , Comfort High School Data. Comfort ISD TEA score of 78 (C rating); math proficiency at 10-14% (Meets Grade Level or above) vs. state average of ~44%; graduation rate of 99%. publicschoolreview.com
10. Texas School Report Cards , Northside ISD. District enrollment of 99,729 students for the 2024-2025 school year. txschools.gov
11. Community Impact , Northside ISD TEA Rating. Northside ISD received a C rating from the TEA for the third consecutive year; overall score of 75. communityimpact.com
12. Community Impact , Northside ISD FY 2025-26 Budget. Northside ISD approved school district tax rate of $1.0049 per $100 of assessed value. communityimpact.com

Last verified: July 1, 2026