School districts in Wisconsin

Wisconsin ranks 3rd among the states for how often the mail and the schools disagree: 77% of its 781 populated ZIP Code areas are served by more than one school district, against 53% across the country. The worst of them is 53105, where 10 districts each hold a real share of the homes and Burlington Area leads with the largest. In 61 of them the answer for grade school is not the answer for high school. The two districts that share the most ZIP Codes here are Herman-Neosho-Rubicon and Hartford Union High, in 7 of them. Counted by homes rather than by ZIP Code area, 79% of the state's housing sits in a ZIP Code that more than one district serves.

Seven ZIP Codes in ten here cross a district line

Wisconsin keeps 10 separate secondary districts — districts that pick students up partway through and run to the end of high school, over several elementary districts at once. Where one of those sits, an address has two district names and neither is wrong.

ZIP Code areas with a district781
Served by more than one district600 (77%)
Grade school and high school differ61 (7.8%)
No high school district named0
Unified districts368
Elementary districts43
Secondary districts10
Homes in no district at all3

The largest districts in Wisconsin

Ranked by the homes inside their boundaries: Milwaukee leads at 257,723, then Madison Metropolitan and Racine. Only districts with a page here are linked; 415 more exist in the state without one.

The most divided ZIP Code area in Wisconsin

ZIP Code area 53105 holds 12,890 homes and 10 districts take a real share of them for the early grades, but Burlington Area holds 75% on its own at that level. This is the shape that makes a single-name lookup look right: it names Burlington Area and describes most of the homes here, and silently not the rest.

Grade schoolBurlington Area School District75%9,634 of 12,890 homes

High schoolBurlington Area School District75%9,634 of 12,890 homes

Each percentage here is a share of the 12,890 homes counted in ZIP Code 53105, not the chance that any one address is in that district. Enrollment follows the street: two houses on opposite sides of the same road can be in different districts, and only the district office can say which.

Every track below is 35 cells long and stands for all 12,890 homes counted in ZIP Code 53105, so one cell is 368 homes, rounded to the nearest whole cell. Cells lit solid are the homes one district holds, and the unlit cells are the homes held by the other districts in the same list.

Burlington Area School District9,634 of 12,890 homes75%
Wheatland Joint No. 1 School District1,406 of 12,890 homes11%
Waterford Joint No. 1 School District810 of 12,890 homes6.3%
Lake Geneva Joint No. 1 School District367 of 12,890 homes2.8%
Randall Joint No. 1 School District323 of 12,890 homes2.5%
East Troy Community School District240 of 12,890 homes1.9%

3 further districts reach into this area and hold 110 homes between them, under half a percent of the homes named at this level each.

For grade school, an answer of one district name would be wrong for 3,256 of the 12,890 here.

How much of Wisconsin a single district name misses

Across the 781 ZIP Code areas in Wisconsin with homes in them, an answer of one district name misses 323,514 of the 2,727,764 homes they hold — 12% of the state. In 162 of those areas the single name is the whole truth; in the other 619 it is not.

ZIP Code 54115 · Hobart, Wisconsin names 5 districts. West De Pere is the largest of them for grade school, and an answer of its name alone misses 10,223 of the 19,584 homes there; De Pere Unified, Wrightstown Community and Freedom Area hold the rest.

In ZIP Code 53219 · Milwaukee, Wisconsin the largest district for grade school is Milwaukee, and naming it alone misses 8,040 of the 16,080 homes counted there. The rest are with West Allis and Greenfield.

In ZIP Code 53211 · Milwaukee, Wisconsin the largest district for grade school is Milwaukee, and naming it alone misses 8,016 of the 16,976 homes counted there. The rest are with Shorewood and Whitefish Bay.

Where a ZIP Code here names more than one district

Of the 781 ZIP Code areas in Wisconsin that the federal file names a district for, 600 name more than one school district. These are the 12 with the most, starting at 10 districts in one postal area: Rochester, Yorkville and Richfield. Each row opens the full answer for that ZIP Code, with every district named for grade school and for high school and the share of the homes each one holds.

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: 600 of the 781 ZIP Code areas in Wisconsin with a district named for them are served by more than one school district, and the line between two of 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.