Sioux City, IA-NE-SD Metro Area
The Sioux City, IA-NE-SD metro area is made up of 3 counties in Iowa, Nebraska, and South Dakota: Woodbury, Dakota, and Union, largest first. About 145,738 people lived there on July 1, 2025 (Census estimate), 0.9% more than in April 2020.
- Population, July 2025
- 145,738 0.9% more than in April 2020
- Type
- Metropolitan statistical area
- Counties
- 3, all central
- Land area
- 1,598 sq mi (4,139 km²)
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- States
- Iowa, Nebraska, South Dakota
- Combined statistical area
- Sioux City-Le Mars, IA-NE-SD
- CBSA code
- 43580
Counties in the Sioux City, IA-NE-SD metro area, largest first
| County | Role | Population, July 2025 | Share of the area |
|---|---|---|---|
| Woodbury CountyIowa | Central | 106,649 | 73.2% |
| Dakota CountyNebraska | Central | 21,687 | 14.9% |
| Union CountySouth Dakota | Central | 17,402 | 11.9% |
A central county holds the area’s core, an urban area of at least 50,000 people. This area has no outlying counties: no neighboring county sends enough commuters to join it. A county belongs to one metro or micro area at most, and it counts whole, countryside included.
Principal city
- Sioux City86,101 people
OMB names the area after its largest principal cities. A principal city is the area’s largest city, plus any other city that is very large or a big job center, and smaller ones with at least as many jobs as working residents (2020 Census and commuting figures). People counts are American Community Survey 2020–2024 5-year estimates.
Part of the Sioux City-Le Mars, IA-NE-SD combined statistical area
OMB joins neighboring metro and micro areas into a combined statistical area when enough people commute between them. The other area in this one is
- Le Mars, IA Micro Area25,697 people
Bordering metro and micro areas, nearest first
Areas with a county on this area’s edge. Distances are straight lines between the areas’ largest cities.
- Le Mars, IA Micro Area23 mi northeast
- Vermillion, SD Micro Area34 mi northwest
- Sioux Falls, SD-MN Metro Area74 mi north
Before using this answer on a form
A metro or micro area is a statistical area that OMB draws for federal statistics. It is not a city, a local government or a mailing address, and it is not a measure of urban and rural: whole counties count, rural parts included. Programs that use metro areas, such as housing income limits or wage rates, can use their own version of these lists; check the program’s own list for an address.
Find the metro area where you are now, find your county, or see every metro and micro area by population.