奥佐基县（Ozaukee County, Wisconsin）是位于美国威斯康辛州东部的一个县，临密西根湖。面积2,891平方公里，其中2,290平方公里 （79.22%）为水面面积，陆地面积为全州最小。根据美国2000年人口普查估计，共有人口82,317人。县治华盛顿港 (Port Washington)。

成立于1853年3月7日。县名来自索克人的全名Osauki-wug （黄土地的人）。全县是美国贫穷人口第二少的县 （2.6%），人均收入全国第二十五位。

Ozaukee County is a county in the U.S. state of Wisconsin. As of the 2010 census, the population was 86,395. Its county seat is Port Washington.

Ozaukee County is included in the Milwaukee-Waukesha-West Allis, WI Metropolitan Statistical Area.

As of the 2000 Census, Ozaukee County had the 2nd lowest poverty rate of any county in the United States, at 2.6%. In terms of per capita income, it is the 25th wealthiest county in the country. Bolstered by low crime rates and school districts with high graduation rates, Forbes magazine ranked Ozaukee County #2 on its list of "America's Best Places To Raise A Family" in June, 2008.