The City of Avon is in northeastern Lorain County, Ohio, United States that has a total area of 20.87 square miles. The population was 24,847 at the 2020 census, with a median household income of $109,539. The median cost of homes was $327,668. It is part of the Cleveland metropolitan area.

In the 17th century, what is now Avon, Avon Lake, Bay Village, and Westlake were all once one territory. This territory was inhabited by various Native American tribes, such as the Wyandots, Ottawa’s, and Eries, who lived in wigwams or simple-stone dwellings. They settled, traded, fought, and were later forcibly moved elsewhere. The township was administered by Dover township and was part of Cuyahoga County. In 1818, Township Number 7 was organized and named "Xeuma", then later renamed "Troy Township". In 1824, Lorain County was created, and the name of Troy Township was changed to Avon Township. An Avon post office was established in 1825.

The entire township was incorporated into a village in 1917 and became the City of Avon in 1961.