Mequon ( /mɛkwɒn/ mek-won) is a city in Ozaukee County, Wisconsin, United States. It had a population of 21,823 at the 2000 census, and an estimated population of 23,739 in July 2009. The mayor is Curt Gielow.
In July 2005, CNN's Money Magazine listed Mequon 19th among its 100 Best Small Cities in the United States, ranked jointly with Thiensville, a village completely surrounded by Mequon.
The area was originally inhabited by Native Americans; by the early 19th century, the Potawatomi occupied land west of the Milwaukee River, while the Menominee lived between the Milwaukee River and Lake Michigan. European trappers, explorers and traders used the Milwaukee River through the middle of what is now Mequon as a means of transportation. The name "Mequon" is thought to have come from the Native-American word "Emikwaan" or "Miguan," meaning ladle. This refers to how the Milwaukee River curves like a ladle in the Mequon area. The spelling was undoubtedly influenced by the French in the area at the time.