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  5. Area Code 712

Where Is Area Code 712?

Area code 712 is found in the US state of Iowa. Primarily servicing the city of Sioux City (population: 86001), area code 712 covers 32 counties of Iowa.

Located in the Central time zone, area code 712 is on the same time as Chicago, IL.

Area code 712 was brought into effect on January 1, 1947.

Map of Iowa with area code 712 highlighted

Counties in Area Code 712

  • Audubon,
  • Buena Vista,
  • Calhoun,
  • Carroll,
  • Cass,
  • Cherokee,
  • Clay,
  • Crawford,
  • Dickinson,
  • Emmet,
  • Fremont,
  • Harrison,
  • Ida,
  • Lyon,
  • Mills,
  • Monona,
  • Montgomery,
  • Obrien,
  • Osceola,
  • Page,
  • Palo Alto,
  • Plymouth,
  • Pocahontas,
  • Pottawattamie,
  • Sac,
  • Shelby,
  • Sioux,
  • Taylor,
  • Woodbury.

Most Populous Cities in Area Code 712

City County City Population Time Zone
Sioux City Woodbury 86,001 CST
Council Bluffs Pottawattamie 71,725 CST
Storm Lake Buena Vista 12,965 CST
Spencer Clay 12,639 CST
Le Mars Plymouth 12,296 CST
Carroll Carroll 12,263 CST
Denison Crawford 9,960 CST
Glenwood Mills 9,099 CST
Sioux Center Sioux 8,387 CST
Atlantic Cass 8,351 CST
Spirit Lake Dickinson 8,176 CST
Estherville Emmet 7,529 CST
Clarinda Page 7,196 CST
Orange City Sioux 7,092 CST
Red Oak Montgomery 6,921 CST
Harlan Shelby 6,649 CST
Cherokee Cherokee 6,572 CST
Sheldon Obrien 6,118 CST
Shenandoah Page 5,935 CST
Missouri Valley Harrison 5,118 CST
Sergeant Bluff Woodbury 5,117 CST
Rock Valley Sioux 4,951 CST
Emmetsburg Palo Alto 4,470 CST
Milford Dickinson 4,444 CST
Rock Rapids Lyon 3,902 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 modified on July 3, 2015.