Olmsted County, Minnesota

Olmsted County, Minnesota
Olmsted County Government Center (pre-expansion)
Location within the U.S. state of Minnesota
Coordinates: 43°59′59″N 92°24′37″W / 43.999688°N 92.410155°W / 43.999688; -92.410155
Country United States
State Minnesota
FoundedFebruary 20, 1855 (created)
August 27, 1855 (organized)
Named afterDavid Olmsted
SeatRochester
Largest cityRochester
Government
 • BodyBoard of Commissioners
 • ChairDave Senjem
Area
 • Total
654.754 sq mi (1,695.81 km2)
 • Land653.509 sq mi (1,692.58 km2)
 • Water1.245 sq mi (3.22 km2)  0.19%
Population
 (2020)
 • Total
162,847
 • Estimate 
(2024)
166,424
 • Density249.189/sq mi (96.2123/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Area code507 and 924
Congressional district1st
Websiteolmstedcounty.gov

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 166,424 in 2024, 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.