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  5. Area Code 641

Where Is Area Code 641?

Area code 641 is found in the US state of Iowa. Primarily servicing the city of Marshalltown (population: 31752), area code 641 covers 40 counties of Iowa.

Located in the Central time zone, area code 641 is on the same time as Chicago, IL.

Area code 641 was brought into effect on July 9, 2000. 641 was split from the parent 515 area code.

Map of  with area code 641 highlighted

Counties in Area Code 641

  • Adair,
  • Adams,
  • Appanoose,
  • Butler,
  • Cerro Gordo,
  • Chickasaw,
  • Clarke,
  • Davis,
  • Decatur,
  • Floyd,
  • Franklin,
  • Grundy,
  • Guthrie,
  • Hancock,
  • Hardin,
  • Howard,
  • Jasper,
  • Jefferson,
  • Keokuk,
  • Lucas,
  • Madison,
  • Mahaska,
  • Marion,
  • Marshall,
  • Mitchell,
  • Monroe,
  • Poweshiek,
  • Ringgold,
  • Story,
  • Tama,
  • Taylor,
  • Union,
  • Wapello,
  • Warren,
  • Wayne,
  • Winnebago,
  • Worth,
  • Wright.

Most Populous Cities in Area Code 641

City County City Population Time Zone
Marshalltown Marshall 31,752 CST
Ottumwa Wapello 30,000 CST
Mason City Cerro Gordo 29,591 CST
Newton Jasper 20,283 CST
Oskaloosa Mahaska 15,096 CST
Pella Marion 13,984 CST
Fairfield Jefferson 13,350 CST
Knoxville Marion 11,758 CST
Grinnell Poweshiek 11,429 CST
Charles City Floyd 10,187 CST
Creston Union 9,625 CST
Clear Lake Cerro Gordo 9,306 CST
Centerville Appanoose 7,733 CST
Bloomfield Davis 7,046 CST
Osceola Clarke 6,873 CST
Iowa Falls Hardin 6,762 CST
Chariton Lucas 6,392 CST
Albia Monroe 6,045 CST
Forest City Winnebago 5,711 CST
Hampton Franklin 5,707 CST
Osage Mitchell 5,586 CST
New Hampton Chickasaw 5,416 CST
Tama Tama 4,445 CST
Garner Hancock 4,083 CST
Eldora Hardin 3,411 CST

Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.

View all United States Area Codes.

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This page was last updated on July 3, 2015.