Olmsted County
Sign in to savecounty in Minnesota, United States
Key facts
- Country
- United States
- State
- Minnesota
- Founded
- February 20, 1855 (created), August 27, 1855 (organized)
- Named after
- David Olmsted
- Seat
- Rochester
- Largest city
- Rochester
- Body
- Board of Commissioners
- Chair
- Dave Senjem
- Total
- 654.754 sq mi (1,695.81 km )
- Land
- 653.509 sq mi (1,692.58 km )
- Water
- 1.245 sq mi (3.22 km ) 0.19%
- Estimate 2025
- 166,731
- Density
- 249.189/sq mi (96.2123/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Area code
- 507 and 924
- Congressional district
- 1st
- Website
- olmstedcounty.gov
via Wikipedia infobox
Article
Olmsted County is a county located in the U.S. state of Minnesota. As of the 2020 census, the population is 162,847, and was estimated to be 166,731 in 2025, making it the seventh-most populous county in Minnesota. The county seat and the largest city is Rochester.
Olmsted County is part of the Rochester metropolitan area.