Delaware County, Iowa
| Delaware County | |
|---|---|
| Location within the U.S. state of Iowa | |
| Iowa's location within the U.S. | |
| Coordinates: 42°28′10″N 91°22′13″W / 42.469444444444°N 91.370277777778°W | |
| Country | United States | 
| State | Iowa | 
| Founded | 1837 | 
| Named after | State of Delaware | 
| Seat | Manchester | 
| Largest city | Manchester | 
| Area | |
|  • Total | 579 sq mi (1,500 km2) | 
| • Land | 578 sq mi (1,500 km2) | 
| • Water | 1.2 sq mi (3 km2) 0.2% | 
| Population  (2020) | |
|  • Total | 17,488 | 
| • Density | 30/sq mi (12/km2) | 
| Time zone | UTC−6 (Central) | 
| • Summer (DST) | UTC−5 (CDT) | 
| Congressional district | 2nd | 
| Website | delawarecounty | 
Delaware County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 17,488. The county seat is Manchester. The county takes its name after the U.S. state of Delaware.