Ozaukee County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 91,503. Its county seat is Port Washington. Ozaukee County is included in the Milwaukee–Waukesha–West Allis, WI Metropolitan Statistical Area.

The Sauk or Sac are a group of Native Americans of the Eastern Woodlands culture group, who lived primarily in the region of what is now Green Bay, Wisconsin, when first encountered by the French in 1667. Their autonym is oθaakiiwaki, and their exonym is Ozaagii(-wag) in Ojibwe. The latter name was transliterated into French and English by colonists of those cultures. Today they have three federally recognized tribes, together with the Meskwaki (Fox), located in Iowa, Oklahoma and Kansas.