Delaware County, Ohio

Delaware County
Delaware County
County
	Delaware County Courthouse
	Seal
	Location within the U.S. state of Ohio
	Ohio's location within the U.S.
	Coordinates: 40°17′N 83°01′W / 40.28°N 83.01°W
Country	United States
State	Ohio
Founded	February 10, 1808
Named for	the Delaware Indians
Seat	Delaware
Largest city	Delaware*
Area
• Total	457 sq mi (1,180 km2)
• Land	443 sq mi (1,150 km2)
• Water	14 sq mi (40 km2) 3.1%
Population (2020)
• Total	214,124
• Estimate (2022)	226,296
• Density	470/sq mi (180/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional districts	4th, 12th
Website	www.co.delaware.oh.us
	*Based on population just within the county.

Delaware County is a county located in the central portion of the U.S. state of Ohio. As of the 2020 census, the population was 214,124.^[3] Its county seat and largest city is Delaware.^[4]

The county was formed in 1808 from Franklin County, Ohio. Both the county and its seat are named after the Delaware Indian tribe.^[5] It is a frequent placeholder on the List of highest-income counties in the United States; Delaware County was listed as the 35th wealthiest county in the United States in 2020.^[6]^[7] Delaware County is included in the Columbus, Ohio, metropolitan area. U.S. President Rutherford B. Hayes was born and raised in Delaware County. It is also home to the Columbus Zoo and Aquarium.

^ "Ohio County Profiles: Delaware County" (PDF). Ohio Department of Development. Archived (PDF) from the original on May 12, 2014. Retrieved May 11, 2014.
^ "Delaware County data (population)". Ohio State University Extension Data Center. Retrieved May 10, 2007.^{[permanent dead link]}
^ "U.S. Census Bureau QuickFacts: Hamilton County, Ohio". www.census.gov. United States Census Bureau. Retrieved June 26, 2022.
^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
^ "Delaware County". Ohio History Central. Ohio Historical Society. Retrieved May 11, 2014.
^ "Richest counties in the US: Here's where household incomes in each state are the highest". USA Today. Retrieved January 4, 2021.
^ "These are the richest counties in US". The Columbus Dispatch. Archived from the original on January 26, 2021. Retrieved January 4, 2021.