The land making up Ozaukee County was
originally part of Milwaukee County which made up the
entire southeast section of Wisconsin. In 1830 the first
Wisconsin Territorial Legislature set off from Milwaukee
County a portion of this land and called it Washington
County.
Because of the continued great
dissension between several of the communities,
principally Port Washington, Cedarburg, Grafton, and West
Bend concerning the location of the county seat, the
people finally caused the division of Washington County
into the two present Ozaukee and Washington counties.