Cedarburg, city (1990 pop. 9,895), Ozaukee co., E Wis., on tributary of Milwaukee R., and a suburb 17 mi/27 km N of Milwaukee; 43°17'N 87°59'W. Trade center in dairying and farming area; light and heavy mfg); limestone quarries. Settled 1842, inc. 1885. Hamilton historic district, covered bridge. Winery.