The Iowa Interstate and US Highway network.

Sitemap to all pages covering the state of Iowa. Photography contributions by Alex Nitzman, Andy Field, Bill Gatchel, Brent Ivy and Scott Onson.

Photo Guides

Many of the mileage statistics for highways cited throughout the AARoads’ Iowa guides were obtained from the extensively researched Iowa Highways Page by Jason Hancock. Additionally Jeff Morrison’s Iowa Highway Ends further covers each highway in the Hawkeye State with photos covering every end or entrance point from adjoining states.

Population Statistics

State Population
Metropolitan Populations
Des Moines-West Des Moines 709,466 Quad Cities 384,324
Cedar Rapids 276,520 Iowa City 175,419
Sioux City 149,940 Ames 125,252
Top County Populations
Polk 492,401 Linn 230,299
Scott 174,669 Johnson 152,854
Black Hawk 131,144 Woodbury 105,941
Dallas 99,678 Dubuque 99,266
Top City Populations
Des Moines 212,312 Cedar Rapids 134,027
Davenport 101,799 Sioux City 82,759
Iowa City 76,608 Ankeny 70,068
West Des Moines 69,057 Waterloo 67,292
Ames 67,033 Council Bluffs 62,216
Sources: 2020 U.S. Census Data (metro populations and counties), 2020 U.S. Census Estimate (cities)

About Iowa

  • Capital: Des Moines
  • Nickname: Hawkeye State
  • State Flower: Wild Rose
  • State Bird: Eastern Goldfinch
  • State Tree: Oak
  • Total Interstate Mileage: 781.24
  • Land Area: 55,869.3 square miles
  • Acres in Farmland (2006): 31,500,000
  • Highest Point: Hawkeye Point 1,670 feet
  • Lowest Point: Mississippi River in Lee County 480 feet
  • Number of Counties: 99
  • Number of Incorporated Places: 948
  • Statehood: 29th state; admitted December 28, 1846
  • Quaker Oats, in Cedar Rapids, is the largest cereal company in the world.
  • Dubuque is home to the only county courthouse with a gold dome.
  • Herbert Hoover, a West Branch native, was the 31st president of the United States and the first one born west of the Mississippi.
  • Iowa is ranked first in Pork, Corn and Egg production in the U.S.

Major League Sports Franchises


Updated February 26, 2024.