Delaware County, Iowa

Delaware County, Iowa
The Delaware County Courthouse in Manchester
Location within the U.S. state of Iowa
Coordinates: 42°28′10″N 91°22′13″W / 42.469444444444°N 91.370277777778°W / 42.469444444444; -91.370277777778
Country United States
State Iowa
FoundedDecember 21, 1837 (created)
February 8, 1844 (organized)
Named afterState of Delaware
SeatManchester
Largest cityManchester
Area
 • Total
579 sq mi (1,500 km2)
 • Land578 sq mi (1,500 km2)
 • Water1.2 sq mi (3.1 km2)  0.2%
Population
 (2020)
 • Total
17,488
 • Estimate 
(2024)
17,609
 • Density30.3/sq mi (11.7/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district2nd
Websitedelawarecounty.iowa.gov
  • Iowa county number 28

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.