School districts in South Dakota
South Dakota ranks 9th among the states for how often the mail and the schools disagree: 73% of its 375 populated ZIP Code areas are served by more than one school district, against 53% across the country. The worst of them is 57363, where 7 districts each hold a real share of the homes and Mount Vernon School District 17-3 leads with the largest. In 2 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 Viborg Hurley School District 60-6 and Irene-Wakonda School District 13-3, in 5 of them.
Seven ZIP Codes in ten here cross a district line
The state sits well above the national rate: 73% of its ZIP Code areas cross a district line against 53% across the country. With 147 districts over 375 populated ZIP Code areas, every extra district is another line to cross.
- ZIP Code areas with a district375
- Served by more than one district273 (73%)
- Grade school and high school differ2 (0.5%)
- No high school district named1
- Unified districts147
- Elementary districts0
- Secondary districts0
- Homes in no district at all0
The largest districts in South Dakota
Ranked by the homes inside their boundaries: Sioux Falls School District 49-5 leads at 70,572, then Rapid City School District 51-4 and Aberdeen School District 06-1. Only districts with a page here are linked; 141 more exist in the state without one.
- Sioux Falls School District 49-570,572 homes · 10 ZIP areas
- Rapid City School District 51-443,913 homes · 8 ZIP areas
- Harrisburg School District 41-213,210 homes · 7 ZIP areas
- Madison Central School District 39-24,418 homes · 6 ZIP areas
- Hot Springs School District 23-23,409 homes · 6 ZIP areas
- Lemmon School District 52-41,210 homes · 7 ZIP areas
The most divided ZIP Code area in South Dakota
ZIP Code area 57363 holds 438 homes and 7 districts take a real share of them for the early grades, but Mount Vernon School District 17-3 holds 90% on its own at that level. This is the shape that makes a single-name lookup look right: it names Mount Vernon School District 17-3 and describes most of the homes here, and silently not the rest.
Each percentage here is a share of the 438 homes counted in ZIP Code 57363, 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 438 homes counted in ZIP Code 57363, so one cell is 13 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.
- Mount Vernon School District 17-3393 of 438 homes90%
- Ethan School District 17-114 of 438 homes3.2%
- Corsica-Stickney School District 21-311 of 438 homes2.5%
- Mitchell School District 17-26 of 438 homes1.4%
- Woonsocket School District 55-45 of 438 homes1.1%
- Plankinton School District 01-14 of 438 homes0.9%
- Sanborn Central School District 55-54 of 438 homes0.9%
One further district reaches into this area and holds 1 home in it, under half a percent of the homes named at this level.
For grade school, an answer of one district name would be wrong for 45 of the 438 here.
Where a single district name still works in South Dakota
Across the 375 ZIP Code areas in South Dakota with homes in them, an answer of one district name misses 26,107 of the 392,907 homes they hold. That is 6.6% of the state, and in 80 of the areas one name covers everything: this is a state where the familiar answer is usually the right one, and the areas below are where it is not.
In ZIP Code 57108 · Sioux Falls, South Dakota the largest district for grade school is Harrisburg School District 41-2, and naming it alone misses 3,989 of the 13,884 homes counted there. The rest are with Sioux Falls School District 49-5 and Canton School District 41-1.
In ZIP Code 57110 · Sioux Falls, South Dakota the largest district for grade school is Sioux Falls School District 49-5, and naming it alone misses 2,515 of the 9,028 homes counted there. The rest are with Brandon Valley School District 49-2.
ZIP Code 57106 · Sioux Falls, South Dakota names 4 districts. Sioux Falls School District 49-5 is the largest of them for grade school, and an answer of its name alone misses 1,455 of the 20,314 homes there; Tea Area School District 41-5, Harrisburg School District 41-2 and Lennox School District 41-4 hold the rest.
Where a ZIP Code here names more than one district
Of the 375 ZIP Code areas in South Dakota that the federal file names a district for, 273 name more than one school district. These are the 12 with the most, starting at 7 districts in one postal area: Mount Vernon, Colman and Garretson. 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 57363 · Mount Vernon, South Dakota7 districts · 438 homes
- ZIP Code 57017 · Colman, South Dakota6 districts · 540 homes
- ZIP Code 57030 · Garretson, South Dakota6 districts · 1,168 homes
- ZIP Code 57053 · Parker, South Dakota6 districts · 852 homes
- ZIP Code 57322 · Shamrock Colony, South Dakota6 districts · 108 homes
- ZIP Code 57014 · Centerville, South Dakota5 districts · 689 homes
- ZIP Code 57055 · Renner Corner, South Dakota5 districts · 474 homes
- ZIP Code 57212 · Arlington, South Dakota5 districts · 1,118 homes
- ZIP Code 57313 · Armour, South Dakota5 districts · 558 homes
- ZIP Code 57359 · Letcher, South Dakota5 districts · 307 homes
- ZIP Code 57638 · Lemmon, South Dakota5 districts · 1,134 homes
- ZIP Code 57003 · Baltic, South Dakota4 districts · 811 homes
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: 273 of the 375 ZIP Code areas in South Dakota 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.