Iowa: Time Zones, Counties, Cities & Map

Metro and micro areas in Iowa, largest first

9 metro areas and 15 micro areas have counties in Iowa. 4 cross into another state; their populations are for the whole area. Populations are July 2025 estimates.

1. Omaha, NE-IA Metro Area1,009,836 people
2. Des Moines-West Des Moines, IA Metro Area758,539 people
3. Davenport-Moline-Rock Island, IA-IL Metro Area380,452 people
4. Cedar Rapids, IA Metro Area279,285 people
5. Iowa City, IA Metro Area182,711 people
6. Waterloo-Cedar Falls, IA Metro Area169,189 people
7. Sioux City, IA-NE-SD Metro Area145,738 people
8. Ames, IA Metro Area128,090 people
9. Dubuque, IA Metro Area99,381 people
10. Mason City, IA Micro Area49,710 people
11. Clinton, IA Micro Area46,002 people
12. Burlington, IA-IL Micro Area44,061 people

Every metro and micro area in the US

Largest townships in Iowa

1. Des Moines Township, Polk County100,004 people
2. Walnut Township, Polk County69,695 people
3. Crocker Township, Polk County68,211 people
4. Lee Township, Polk County64,103 people
5. Webster Township, Polk County63,017 people
6. Kane Township, Pottawattamie County54,071 people
7. Washington Township, Story County46,860 people
8. Marion Township, Linn County44,817 people
9. Pleasant Valley Township, Scott County41,593 people
10. Walnut Township, Dallas County39,414 people
11. Boone Township, Dallas County35,220 people
12. Bloomfield Township, Polk County33,841 people

All 1,600 townships in Iowa, by county

Tribal areas in Iowa, largest first

1. Sac and Fox/Meskwaki Settlement and Off-Reservation Trust Land1,023 people

American Indian, Alaska Native and Native Hawaiian areas as the Census Bureau maps them, with at least 2% of their area here, water included. These lines don’t decide membership, jurisdiction or land status.

Counties and equivalents, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

1. Polk County, Iowa516,546 people
2. Linn County, Iowa232,028 people
3. Scott County, Iowa175,259 people
4. Johnson County, Iowa160,044 people
5. Black Hawk County, Iowa131,532 people
6. Dallas County, Iowa118,457 people
7. Woodbury County, Iowa106,649 people
8. Story County, Iowa101,291 people
9. Dubuque County, Iowa99,381 people
10. Pottawattamie County, Iowa92,996 people
11. Warren County, Iowa57,331 people
12. Clinton County, Iowa46,002 people

See all 99 counties and equivalents in Iowa, largest first

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

1. Des Moines, Iowa (city)212,421 people
2. Cedar Rapids, Iowa (city)137,264 people
3. Davenport, Iowa (city)100,913 people
4. Sioux City, Iowa (city)86,101 people
5. Iowa City, Iowa (city)75,752 people
6. Ankeny, Iowa (city)72,615 people
7. West Des Moines, Iowa (city)71,083 people
8. Ames, Iowa (city)67,669 people
9. Waterloo, Iowa (city)67,008 people
10. Council Bluffs, Iowa (city)62,586 people
11. Dubuque, Iowa (city)59,174 people
12. Urbandale, Iowa (city)46,595 people

See all 1,026 cities, towns and communities in Iowa, largest first

ZIP Code areas, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

1. ZIP 5002346,306 people
2. ZIP 5061343,867 people
3. ZIP 5200143,101 people
4. ZIP 5240442,958 people
5. ZIP 5240242,938 people
6. ZIP 5230242,706 people
7. ZIP 5272241,264 people
8. ZIP 5150337,972 people
9. ZIP 5026637,523 people
10. ZIP 5031736,548 people
11. ZIP 5224035,074 people
12. ZIP 5031534,816 people

See all 972 ZIP Code areas in Iowa, largest first

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