Delaware is a city in the U.S. state of Ohio and the county seat of Delaware County. The municipality is located near the center of the state of Ohio, about 20 miles north of Columbus, Ohio. Delaware was founded in 1808, incorporated in 1816. It is part of the Columbus Metropolitan Area. The population was 25,246 at the 2000 census. According to the US Census 2006 estimate, Delaware has a population of 32,100, while the Columbus-Marion-Chillicothe, OH Combined Statistical Area has 1,953,575 people. According to a list compiled by American Demographics Incorporated, Delaware County ranks fourteenth out of twenty areas in the United States designated as the fastest-growing in the year 2000. Delaware apartments for rent comparison page shows most up to date rent information on Delaware apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.