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. Woodbury County
7. Dubuque County
8. Story County
9. Dallas County
10. Pottawattamie County

Largest 10 Cities by Population

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

Largest 10 Zip Codes by Population

1. 50613
2. 52001
3. 52402
4. 50023
5. 52302
6. 52404
7. 52722
8. 51503
9. 52240
10. 50317