Kenmore-Tonawanda Union Free School District
New York · runs pre-K through grade 12
Kenmore-Tonawanda Union Free is the only school district serving 2 of the 4 ZIP Code areas it touches, and shares the other 2 with neighbors. It covers 31,868 homes and 66,459 residents. By homes covered it ranks 11th of the 679 districts in New York. At 1,862 homes to the square mile it is one of the dense ones; district lines in that kind of territory follow streets rather than county roads.
Where this district is the answer, and where it is not
At 1,862 homes to the square mile this is city territory, and district lines in a city follow streets. Kenmore-Tonawanda Union Free covers 17 square miles in all — small enough that a single ZIP Code area can hold most of it, and several ZIP Codes can cut across it.
- Homes inside the boundary31,868
- Residents66,459
- ZIP Code areas it reaches4
- Where it is the only district2
- Where it shares with another district2
- Where it holds under half a percent0
- Land area17 square miles
- Homes per square mile1,862
The ZIP Code areas it reaches
The spread is the thing to notice. In 14217 this district holds 100% of the homes; in 14207 it holds 4.3% of the homes. Same district, opposite answers, and a lookup that names it without the share tells the second household the same thing as the first.
- ZIP Code 14217 · Tonawanda Town, New York100% of the homes
- ZIP Code 14223 · Tonawanda Town, New York100% of the homes
- ZIP Code 14150 · Tonawanda Town, New York47% of the homes
- ZIP Code 14207 · Buffalo, New York4.3% of the homes
The areas it leads without holding most of the homes
Kenmore-Tonawanda Union Free is the largest district in 3 ZIP Code areas. Answer with its name alone and the answer misses 10,483 of the 41,856 homes those areas hold — though in 1 of them it holds every home there is. The count is homes, not addresses, and it is the number no lookup prints.
Kenmore-Tonawanda Union Free is the largest name in ZIP Code 14150 · Tonawanda Town, New York and still holds a minority of it: 9,473 of 19,945 homes. The other 10,472 homes are with Tonawanda City and Sweet Home Central. This is the shape that makes a one-name answer worst — the name is right for fewer homes than it is wrong for.
ZIP Code 14223 · Tonawanda Town, New York is a two-district area: 10,449 of its 10,460 homes are inside Kenmore-Tonawanda Union Free, and the other 11 homes are in a district too small to name here. Which one an address belongs to is settled by the street, not by the five digits.
In ZIP Code 14217 · Tonawanda Town, New York the single-name answer is the true one: Kenmore-Tonawanda Union Free holds all 11,451 homes counted there, and no other district holds a share worth naming.
Kenmore-Tonawanda Union Free is not the name anyone would give for ZIP Code 14207 · Buffalo, New York — Buffalo City leads it — and Kenmore-Tonawanda Union Free holds 495 homes there all the same. Answer that area with one name and that is what it is wrong about.
Who takes the other homes in its ZIP Codes
Kenmore-Tonawanda Union Free runs pre-K through grade 12 itself, so an address it holds sees no change of authority between grade school and high school. The districts listed below are the ones that take the other homes in the ZIP Code areas it shares — Buffalo City, Tonawanda City and Sweet Home Central. They are neighbors on the same postal ground, not the next stop for its own students.
- Buffalo City School District11,131 homes in 1 shared ZIP Code area
- Tonawanda City School District7,365 homes in 1 shared ZIP Code area
- Sweet Home Central School District3,107 homes in 1 shared ZIP Code area
Who it shares ZIP Codes with
These districts appear alongside Kenmore-Tonawanda Union Free in the same ZIP Code areas: Buffalo City, Sweet Home Central and Tonawanda City. A single-name lookup for one of those areas has to choose between them, and the choice is right for some addresses and wrong for others.
- Buffalo City School District1 shared ZIP area
- Sweet Home Central School District1 shared ZIP area
- Tonawanda City School District1 shared ZIP area
Where this district sits
What to do next
Ask the district office to confirm your street address. A district settles that question on its own site: look for a school locator, a find my school tool, or an attendance zone map. Where there is none, ask the office itself.
A ZIP Code is a set of mail delivery routes, not a boundary: in 2 of the 4 ZIP Code areas Kenmore-Tonawanda Union Free reaches, at least one other district holds a real share of the homes as well, and the line between them runs along streets. Only the district can say which side of that line an address is on.
This site links to no district website. None of the federal files it is built from publishes one, and a guessed address is worse than none. It is the district office, not a search engine, that settles an address.
If a house purchase depends on the answer, ask the district itself for written confirmation of that exact address. A listing is not a district record, and neither is this page.
What this cannot tell you
The homes were counted in the 2020 Census and the district lines are the 2026 boundary file. Nothing on this page adjusts one to the other. Where houses have been built or cleared since the count, a share here describes the place as it was counted rather than as it stands today, and in the fastest-growing ZIP Code areas that gap is the largest single source of error on this site.
A share on this page is a share of the homes in the ZIP Code area, not a probability for any particular address. Enrollment is decided by street address, and a district may run magnet, charter or choice programs that ignore the boundary entirely. If a decision depends on the answer, the district office is the only authority; this page shows what the federal boundary files say and when they were published.
A district boundary is not a school attendance zone. This site never says which school an address is assigned to: no current national dataset of attendance zones exists, and the district draws them itself. Nor is anything here endorsed or certified by the Census Bureau; we use their published files, and that is the whole of the relationship.
A ZIP Code is a set of mail delivery routes, not an area. What is mapped here is the Census Bureau's ZIP Code Tabulation Area, the closest published approximation to it. The two are not identical, and a handful of ZIP Codes used only for post office boxes or single buildings have no tabulation area at all.
Where these numbers come from
School district boundaries come from the Census Bureau's Census Geographic Relationship File, current 2026 vintage, which assigns every census block to a unified district or to an elementary and a secondary district. Homes and residents in each block come from the 2020 Census Redistricting Data (PL 94-171), H1_001 and P1_001. The ZIP Code areas come from the same Geographic Relationship File, block to ZIP Code Tabulation Area. District names and grade ranges come from the Census Gazetteer 2025, with 2020 for districts no longer listed.
The place name printed beside a ZIP Code comes from the Census 2020 ZIP Code Tabulation Area relationship files: place, county subdivision and county, taken 2026-09-06. It is a label rather than a measurement: the Census Bureau does not publish which post office a ZIP Code belongs to, so the place named is the one covering the most land inside the area, not the city the Postal Service prints on an envelope.
Everything else on this page — the shares, the counts of districts per ZIP, the comparison between the two grade bands, the rankings — is computed here from those files. The source publishes none of it. Snapshot taken 2026-09-03.