ZIP Code 57049
North Sioux City · Union, South Dakota
57049 is the ZIP code of North Sioux City in Union, South Dakota, United States.
- ZIP Code
- 57049
- County
- Union
- State
- South Dakota
- Country
- United States
Place with ZIP code 57049
| Place | County | Location |
|---|---|---|
| North Sioux City | Union | 42.525, -96.507 |
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 57049?
North Sioux City.
Which county and state is 57049 in?
Union, South Dakota, United States.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.