57701 ZIP Code: Rapid City, South Dakota
ZIP code 57701 covers Rapid City, South Dakota. It sits in Pennington County. Rapid City is covered by 4 ZIP codes in total, so 57701 is one delivery area within it rather than the whole city. A ZIP code is a US Postal Service mail route, not a boundary on a map, so it describes where post is delivered rather than an administrative area.
| ZIP code | 57701 |
|---|---|
| Place | Rapid City |
| State | South Dakota (SD) |
| County or equivalent | Pennington County |
| ZIP codes covering Rapid City | 4 |
| Phone area codes in South Dakota | 1 |
| Country | United States |
Phone area codes in South Dakota
ZIP codes and area codes are separate systems drawn for different purposes, so no ZIP code maps to exactly one area code. Of the 1 codes used in South Dakota, 605 is centred on Rapid City.
ZIP codes near 57701
- 57706 Ellsworth Afbabout 6 miles
- 57703 Rapid Cityabout 7 miles
- 57719 Box Elderabout 7 miles
- 57718 Black Hawkabout 7 miles
- 57709 Rapid Cityabout 7 miles
- 57769 Piedmontabout 10 miles
- 57702 Rapid Cityabout 12 miles
- 57759 Nemoabout 17 miles
Distances are straight-line, between the approximate centres of each delivery area.
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Frequently asked questions
Where is ZIP code 57701?
ZIP code 57701 is in Rapid City, South Dakota, in Pennington County. ZIP codes are mail delivery routes rather than mapped regions, so the code identifies a set of addresses the Postal Service serves together, not a district with fixed borders.
What county is 57701 in?
57701 is in Pennington County, South Dakota. A single ZIP code can straddle a county line, because mail routes were drawn for delivery efficiency and take no notice of county boundaries, so the county shown is the one the code is primarily associated with.
What area code goes with ZIP code 57701?
ZIP codes and telephone area codes are separate systems with different boundaries, so no ZIP code maps to exactly one area code. South Dakota uses 1 geographic area code: 605. Of those, 605 is centred on Rapid City itself.
How many ZIP codes does Rapid City have?
Rapid City, South Dakota has 4 ZIP codes in this dataset, of which 57701 is one. Large cities are split across many codes so mail can be sorted by district, and the codes are usually numerically close to each other.
Is 57701 a real ZIP code?
Yes. 57701 appears in the GeoNames postal-code dataset as an active US code assigned to Rapid City, South Dakota. Codes that have been retired or never issued do not appear, which is why entering one on this site returns a not-found page rather than a blank record.
Why do ZIP code boundaries look odd on maps?
Because they are not boundaries. A ZIP code is a collection of mail routes, and a route is a line a carrier walks or drives, not an area. Any ZIP code map you have seen is somebody's approximation drawn around the addresses in a code, which is also why two ZIP code maps rarely agree with each other.
Can two addresses in the same ZIP code be in different cities?
Yes, routinely. The Postal Service assigns a preferred city name to each code for addressing purposes, and that name often covers several neighbouring towns, unincorporated areas or a whole postal district. The place shown here is the one the source names for the code, not a claim that every address in it is inside that town's limits.
ZIP code, place, county and location data from GeoNames, used under CC BY 4.0, extracted 2026-08-22. ZIP codes are Postal Service delivery routes, not administrative areas, so a code can cross city and county lines and the place name shown is the one the source records for the code. Coordinates are an approximate centre of the delivery area, not a precise location. Population and time zone are not shown because the source does not publish them.