Iowa Demographics Site Map

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Browse Iowa Zip Codes

• Zip Codes by Population

Largest 10 Counties by Population

1. Polk County
2. Linn County
3. Scott County
4. Johnson County
5. Black Hawk County
6. Dallas County
7. Woodbury County
8. Dubuque County
9. Story County
10. Pottawattamie County

Largest 10 Cities by Population

1. Des Moines
2. Cedar Rapids
3. Davenport
4. Sioux City
5. Iowa City
6. Ankeny
7. West Des Moines
8. Waterloo
9. Ames
10. Council Bluffs

Largest 10 Zip Codes by Population

1. 50023
2. 50613
3. 52402
4. 52001
5. 52302
6. 52404
7. 52722
8. 51503
9. 50266
10. 50317

20 Richest Counties in Iowa

1. Dallas County
2. Warren County
3. Mills County
4. Johnson County
5. Polk County
6. Sioux County
7. Madison County
8. Plymouth County
9. Bremer County
10. Linn County
11. Scott County
12. Guthrie County
13. Marion County
14. Benton County
15. Dubuque County
16. Dickinson County
17. Adams County
18. Boone County
19. Winneshiek County
20. Delaware County

20 Richest Cities in Iowa

1. Rodman
2. Oak Hills
3. High Amana
4. Tingley
5. University Heights
6. Shueyville
7. Lake Panorama
8. Oto
9. Stone City
10. Kent Estates
11. Cumming
12. Robins
13. Polk City
14. Diamondhead Lake
15. Tiffin
16. Twin Lakes
17. Clive
18. Van Meter
19. West Okoboji
20. Sun Valley Lake