57359 ZIP Code: Letcher, South Dakota
ZIP code 57359 covers Letcher, South Dakota. It sits in Sanborn County. 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 | 57359 |
|---|---|
| Place | Letcher |
| State | South Dakota (SD) |
| County or equivalent | Sanborn County |
| 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. These are every geographic code used across South Dakota.
ZIP codes near 57359
- 57385 Woonsocketabout 12 miles
- 57314 Artesianabout 12 miles
- 57363 Mount Vernonabout 13 miles
- 57301 Mitchellabout 15 miles
- 57358 Laneabout 17 miles
- 57340 Fultonabout 18 miles
- 57368 Plankintonabout 18 miles
- 57337 Fedoraabout 20 miles
Distances are straight-line, between the approximate centres of each delivery area.
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Frequently asked questions
Where is ZIP code 57359?
ZIP code 57359 is in Letcher, South Dakota, in Sanborn 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 57359 in?
57359 is in Sanborn 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 57359?
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.
Is 57359 a real ZIP code?
Yes. 57359 appears in the GeoNames postal-code dataset as an active US code assigned to Letcher, 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.