Garrison Public School District 51

It never has a ZIP Code to itself

1,600 homes hold 2,663 residents, about 1.7 people each. Where households are small, a district's share of the homes overstates its share of the children, and this page counts homes.

• Homes inside the boundary1,600
• Residents2,663
• ZIP Code areas it reaches6
• Where it is the only district0
• Where it shares with another district5
• Where it holds under half a percent1
• Land area409 square miles
• Homes per square mile4

The ZIP Code areas it reaches

Every one of the 5 areas where it holds a real share it shares with somebody. Its largest foothold is 58540 at 84% of the homes; the thinnest is 58759, where it holds no homes at all.

• ZIP Code 58540 · Garrison, North Dakota84% of the homes
• ZIP Code 58531 · Riverdale, North Dakota55% of the homes
• ZIP Code 58735 · Douglas, North Dakota16% of the homes
• ZIP Code 58775 · White Shield, North Dakota15% of the homes
• ZIP Code 58779 · Ryder, North Dakota10% of the homes
• ZIP Code 58759 · Max, North Dakotano homes at all

What one name misses in the areas it leads

Garrison Public School District 51 is the largest district in 2 ZIP Code areas, and not one of them is wholly its own. Answer with its name alone and the answer misses 411 of the 1,923 homes those areas hold. That count is computed here from census blocks; the lookups that answer this question with a single name never print it.

Garrison Public School District 51 holds 1,319 of the 1,570 homes in ZIP Code 58540 · Garrison, North Dakota, so its name is right for most of the area and wrong for the rest: 251 homes with White Shield Public School District 85.

In ZIP Code 58531 · Riverdale, North Dakota the split runs 193 to 160 and the larger part is Garrison Public School District 51's: the rest is 159 homes with Underwood Public School District 8 and Turtle Lake-Mercer Public School District 72 and 1 home in a district too small to name here.

In ZIP Code 58735 · Douglas, North Dakota this district is one name among 4. South Prairie Public School District 70 leads with the largest share and Garrison Public School District 51 holds 44 of the 281 homes counted there; no single name describes that area at all.

Garrison Public School District 51 reaches into ZIP Code 58775 · White Shield, North Dakota with 22 of its 143 homes; 3 districts there hold a real share of it, and White Shield Public School District 85 leads them. The familiar answer for that area is one of the others, and it is wrong for those 22 homes.

ZIP Code 58779 · Ryder, North Dakota repeats the pattern with 4 names holding a real share: 22 of its 217 homes are Garrison Public School District 51's, and the other 195 are not.

Who takes the other homes in its ZIP Codes

Garrison Public School District 51 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 — Max Public School District 50, White Shield Public School District 85 and South Prairie Public School District 70. They are neighbors on the same postal ground, not the next stop for its own students.

• Max Public School District 50421 homes in 3 shared ZIP Code areas
• White Shield Public School District 85363 homes in 2 shared ZIP Code areas
• South Prairie Public School District 70218 homes in 2 shared ZIP Code areas
• Underwood Public School District 8143 homes in 1 shared ZIP Code area
• Lewis and Clark Public School District 161109 homes in 3 shared ZIP Code areas
• Parshall Public School District 343 homes in 1 shared ZIP Code area

Who it shares ZIP Codes with

Garrison Public School District 51 shares ZIP Code areas with 7 different districts. The most frequent are Lewis and Clark Public School District 161, Max Public School District 50, White Shield Public School District 85 and Parshall Public School District 3. In a neighborhood this crowded the question is not which district serves the ZIP Code but which side of which street an address is on.

• Lewis and Clark Public School District 1613 shared ZIP areas
• Max Public School District 502 shared ZIP areas
• White Shield Public School District 852 shared ZIP areas
• Parshall Public School District 31 shared ZIP area
• South Prairie Public School District 701 shared ZIP area
• Turtle Lake-Mercer Public School District 721 shared ZIP area

Where this district sits

• School districts in North Dakota290 of 386 ZIP areas split
• Every district with a page here260 districts listed

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 5 of the 6 ZIP Code areas Garrison Public School District 51 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.