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About Cass County

Cass County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 13,127. Its county seat is Atlantic. It was named to honor Lewis Cass, who was the 1848 Democratic nominee for president.

Description adapted from Wikipedia, CC BY-SA 4.0.

Cass County, Iowa
Cass Co IA Court House — CC0, Smallbones · source

History of Cass County

Cass County is named in honor of Lewis Cass, a Michigan senator and an unsuccessful Democratic candidate for the presidency in 1848. The county was established within its present boundaries in 1851 and originated in 1853. Religious persecution was responsible for bringing the first people of European ancestry to Cass County. The Mormons, fleeing from Illinois, were the earliest settlers, and established a community at Indiantown in 1846. At Indiantown, two of the three commissioners selected to locate a county seat were chosen. The site they chose was one mile (1.6 km) from Indiantown and named Lewis. Most of the people and businesses in Indian Town moved to Lewis shortly after it was laid out. In 1856, a frame courthouse was built, and eight years later a small stone building was completed for the county treasurer's office.

Adapted from Wikipedia, CC BY-SA 4.0.

Cass County at a glance

County seat
Atlantic
Population
13,127 (2020)
Land area
565 sq mi
Founded
1851

Largest communities in Cass County

  1. Grove Township 7,135
  2. Atlantic county seat 6,792
  3. Pleasant Township 1,141
  4. Grant Township 1,133
  5. Griswold 994

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Official channels

Cass County election resources

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Neighboring counties

Part of Iowa Voter Check

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

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