Delaware County, Iowa

Delaware County, Iowa
County
The Delaware County Courthouse in Manchester
Location within the U.S. state of Iowa
Coordinates: 42°28′10″N 91°22′13″W
Country	United States
State	Iowa
Founded	December 21, 1837 (created) February 8, 1844 (organized)
Named for	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 (3.1 km2)  0.2%
Population  (2020)
• Total	17,488
• Estimate  (2025)	17,674
• Density	30.3/sq mi (11.7/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	2nd
Website	delawarecounty.iowa.gov
Iowa county number 28

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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.