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Olmsted County, Minnesota

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Olmsted County, Minnesota
OlmstedGovtCenter — CC BY-SA 3.0, Jonathunder · source

About Olmsted County

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.

Description adapted from Wikipedia, CC BY-SA 4.0.

Olmsted County at a glance

County seat
Rochester
Population
162,847 (2020)
Land area
654 sq mi
Founded
1855

Largest communities in Olmsted County

  1. Rochester county seat121,395
  2. Stewartville6,687
  3. Byron6,312
  4. Chatfield2,997
  5. Cascade Township2,837

History of Olmsted County

The Wisconsin Territory was established by the federal government effective July 3, 1836, and existed until its eastern portion was granted statehood (as Wisconsin) in 1848. Therefore, the federal government set up the Minnesota Territory effective March 3, 1849. The newly organized territorial legislature created nine counties across the territory in October of that year. One of those original counties, Wabasha, had portions partitioned off in 1853 to create Fillmore and Rice counties. Then on February 20, 1855, portions of Rice, Wabasha, and Fillmore counties were partitioned off to create the present county, with Rochester (which was also platted that year) as county seat. The county name recognized David Olmsted (1822–1861), a member of the first territorial council and the fourth mayor of St. Paul. The county boundaries have remained unchanged since 1855.

Adapted from Wikipedia, CC BY-SA 4.0.

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Official channels

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Neighboring counties

Part of Minnesota Voter Check

This is the Olmsted County page of Minnesota Voter Check, a project of True the Vote, pointing Minnesota voters at the official tools that already exist — and at Scan Check Protect to verify your registration.

Where anything here differs from what Olmsted County or the Minnesota Secretary of State publishes, they are right and this page is not.