Rapid City School District 51-4

It never has a ZIP Code to itself

The counts below come from the census blocks assigned to Rapid City School District 51-4, grouped by the ZIP Code area each block falls in. The Census Bureau publishes the blocks; the grouping is computed here, and it is the only place these particular numbers exist.

• Homes inside the boundary43,913
• Residents99,202
• ZIP Code areas it reaches8
• Where it is the only district0
• Where it shares with another district7
• Where it holds under half a percent1
• Land area416 square miles
• Homes per square mile105

The ZIP Code areas it reaches

The spread is the thing to notice. In 57701 this district holds 98% of the homes; in 57751 it holds no homes at all. 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 57701 · Rapid City, South Dakota98% of the homes
• ZIP Code 57702 · Rapid City, South Dakota95% of the homes
• ZIP Code 57703 · Rapid City, South Dakota86% of the homes
• ZIP Code 57718 · Blackhawk, South Dakota79% of the homes
• ZIP Code 57725 · Caputa, South Dakota43% of the homes
• ZIP Code 57719 · Box Elder, South Dakota15% of the homes
• ZIP Code 57744 · Hermosa, South Dakota8.2% of the homes
• ZIP Code 57751 · Keystone, South Dakotano homes at all

What one name misses in the areas it leads

Rapid City School District 51-4 is the largest district in 4 ZIP Code areas, and not one of them is wholly its own. Answer with its name alone and the answer misses 2,910 of the 46,017 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.

Rapid City School District 51-4 holds 5,843 of the 6,819 homes in ZIP Code 57703 · Rapid City, South Dakota, so its name is right for most of the area and wrong for the rest: 976 homes with Douglas School District 51-1.

In ZIP Code 57702 · Rapid City, South Dakota the split runs 14,719 to 770 and the larger part is Rapid City School District 51-4's: the rest is 770 homes with Hill City School District 51-2 and Meade School District 46-1.

ZIP Code 57718 · Blackhawk, South Dakota is a two-district area: 2,385 of its 3,034 homes are inside Rapid City School District 51-4, and the other 649 homes are with Meade School District 46-1. Which one an address belongs to is settled by the street, not by the five digits.

Rapid City School District 51-4 reaches into ZIP Code 57719 · Box Elder, South Dakota with 686 of its 4,512 homes, behind Douglas School District 51-1. The familiar answer for that area is the other name, and it is wrong for those 686 homes.

Rapid City School District 51-4 is not the name anyone would give for ZIP Code 57744 · Hermosa, South Dakota — Custer School District 16-1 leads it — and Rapid City School District 51-4 holds 90 homes there all the same. Answer that area with one name and that is what it is wrong about.

Rapid City School District 51-4 reaches into ZIP Code 57725 · Caputa, South Dakota with 30 of its 69 homes; 3 districts there hold a real share of it, and New Underwood School District 51-3 leads them. The familiar answer for that area is one of the others, and it is wrong for those 30 homes.

Who takes the other homes in its ZIP Codes

Rapid City School District 51-4 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 — Douglas School District 51-1, Custer School District 16-1 and Meade School District 46-1. They are neighbors on the same postal ground, not the next stop for its own students.

• Douglas School District 51-15,049 homes in 3 shared ZIP Code areas
• Custer School District 16-11,103 homes in 2 shared ZIP Code areas
• Meade School District 46-11,035 homes in 3 shared ZIP Code areas
• Hill City School District 51-2945 homes in 2 shared ZIP Code areas
• Oglala Lakota County School District 65-143 homes in 1 shared ZIP Code area
• New Underwood School District 51-337 homes in 1 shared ZIP Code area

Who it shares ZIP Codes with

Rapid City School District 51-4 shares ZIP Code areas with 7 different districts. The most frequent are Douglas School District 51-1, Meade School District 46-1, Custer School District 16-1 and Hill City School District 51-2. 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.

• Douglas School District 51-13 shared ZIP areas
• Meade School District 46-13 shared ZIP areas
• Custer School District 16-11 shared ZIP area
• Hill City School District 51-21 shared ZIP area
• New Underwood School District 51-31 shared ZIP area
• Oglala Lakota County School District 65-11 shared ZIP area

Where this district sits

• School districts in South Dakota273 of 375 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 7 of the 8 ZIP Code areas Rapid City School District 51-4 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.