School districts in Missouri
In Missouri the federal boundary file names an elementary district and no secondary district at all for part of 140 ZIP Code areas. That is an arrangement rather than a hole in the data: the town runs its own grade school and pays tuition for its high school students elsewhere. St. Louis City is the largest district in the state at 173,479 homes; the smallest arrangements are the ones a single-name lookup cannot describe. Its most divided ZIP Code area, 65775, is split between 10 districts for elementary grades alone. In 156 of them the answer for grade school is not the answer for high school.
Towns that run grade school and buy the rest
The state sits well above the national rate: 72% of its ZIP Code areas cross a district line against 53% across the country. With 516 districts over 1,034 populated ZIP Code areas, every extra district is another line to cross.
- ZIP Code areas with a district1,034
- Served by more than one district749 (72%)
- Grade school and high school differ156 (15%)
- No high school district named140
- Unified districts445
- Elementary districts71
- Secondary districts0
- Homes in no district at all0
The largest districts in Missouri
Ranked by the homes inside their boundaries: St. Louis City leads at 173,479, then Kansas City 33 and Springfield R-XII. Only districts with a page here are linked; 510 more exist in the state without one.
- Parkway C-2 School District62,515 homes · 10 ZIP areas
- Rockwood R-VI School District47,521 homes · 15 ZIP areas
- Fort Zumwalt R-II School District45,551 homes · 6 ZIP areas
- Raytown C-2 School District27,336 homes · 7 ZIP areas
- Ritenour School District20,033 homes · 6 ZIP areas
- Center 58 School District13,959 homes · 4 ZIP areas
The most divided ZIP Code area in Missouri
ZIP Code area 65775 is the most divided in Missouri: 10 districts reach into its 11,101 homes, led for the early grades by West Plains R-VII and Fairview R-XI. No single name describes this postal code, and no lookup that gives one is telling the whole truth about it.
5,102 of the 11,101 homes here have no high school district named in the federal file.
Each percentage here is a share of the 11,101 homes counted in ZIP Code 65775, 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 11,101 homes counted in ZIP Code 65775, so one cell is 317 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.
- West Plains R-VII School District5,720 of 11,101 homes52%
- Fairview R-XI School District1,611 of 11,101 homes15%
- Richards R-V School District1,178 of 11,101 homes11%
- Glenwood R-VIII School District1,006 of 11,101 homes9.1%
- Howell Valley R-I School District855 of 11,101 homes7.7%
- Junction Hill C-12 School District452 of 11,101 homes4.1%
- Oregon-Howell R-III School District120 of 11,101 homes1.1%
- Alton R-IV School District60 of 11,101 homes0.5%
3 further districts reach into this area and hold 99 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 5,381 of the 11,101 here.
Where the high school answer in Missouri is missing from the file
Across the 1,034 ZIP Code areas in Missouri with homes in them, an answer of one district name misses 376,961 of the 2,786,952 homes they hold. The arithmetic understates it here: in 140 of those areas some homes have no high school district named at all, so the name that is right for the early grades is not wrong later — there is nothing there to be right about.
ZIP Code 63123 · Affton, Missouri names 5 districts. Affton 101 is the largest of them for grade school, and an answer of its name alone misses 12,912 of the 23,854 homes there; Bayless, Lindbergh and Mehlville R-IX hold the rest.
In ZIP Code 63376 · St. Peters, Missouri the largest district for grade school is Fort Zumwalt R-II, and naming it alone misses 12,781 of the 30,463 homes counted there. The rest are with Francis Howell R-III and St. Charles R-VI.
ZIP Code 63136 · Jennings, Missouri names 4 districts. Riverview Gardens is the largest of them for grade school, and an answer of its name alone misses 11,763 of the 20,674 homes there; Jennings, Hazelwood and St. Louis City hold the rest.
Where a ZIP Code here names more than one district
Of the 1,034 ZIP Code areas in Missouri that the federal file names a district for, 749 name more than one school district. These are the 12 with the most, starting at 10 districts in one postal area: West Plains, Salem and Sullivan. 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.
- ZIP Code 65775 · West Plains, Missouri10 districts · 11,101 homes · 5,102 with no high school district
- ZIP Code 65560 · Salem, Missouri9 districts · 6,331 homes · 2,919 with no high school district
- ZIP Code 63080 · Sullivan, Missouri7 districts · 6,387 homes · 919 with no high school district
- ZIP Code 63557 · North Salem, Missouri7 districts · 167 homes
- ZIP Code 64784 · Sheldon, Missouri7 districts · 596 homes
- ZIP Code 65263 · Middle Grove, Missouri7 districts · 780 homes · 123 with no high school district
- ZIP Code 65340 · Marshall, Missouri7 districts · 6,493 homes · 223 with no high school district
- ZIP Code 65301 · Sedalia, Missouri6 districts · 15,363 homes · 706 with no high school district
- ZIP Code 63068 · New Haven, Missouri6 districts · 2,115 homes · 548 with no high school district
- ZIP Code 63534 · Callao, Missouri6 districts · 382 homes · 298 with no high school district
- ZIP Code 63935 · Doniphan, Missouri6 districts · 3,798 homes · 437 with no high school district
- ZIP Code 64080 · Pleasant Hill, Missouri6 districts · 5,435 homes · 624 with no high school district
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: 749 of the 1,034 ZIP Code areas in Missouri 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.