Westerville is a city in Delaware and Franklin counties in the U.S. state of Ohio. It is a northeastern suburb of Columbus. The population was 36,120 at the 2010 census. Westerville is the home of Otterbein University. Westerville was once known as "The Dry Capital of the World" for its strict laws prohibiting sales of alcohol.
Cultures have inhabited the Westerville area for several millennia. Paleo-Indians and their successor cultures inhabited the area between Big Walnut Creek and Alum Creek. The Wyandot were the primary inhabitants by the time Europeans arrived, living along Alum Creek. They were forced out of Ohio in 1843.
The land that is today Westerville was settled by those of European ancestry around 1810. In 1818, Matthew, Peter, and William Westervelt, settlers of Dutch extraction, migrated to the area from New York.