Cedarburg ( SEE-dər-burg) is a city in Ozaukee County, Wisconsin, United States. Located about 20 miles (32 km) north of Milwaukee and in close proximity to Interstate 43, it is a suburb in the Milwaukee metropolitan area. The city incorporated in 1885, and at the time of the 2020 census the population was 12,121.

Like many of Ozaukee County's cities and villages, the City of Cedarburg began as a mill town. German immigrants began building hydropowered gristmills and woolen mills along Cedar Creek in the 1840s. The community that sprang up around the mills is now downtown Cedarburg. The city was distinctly German into the early 20th century, with several Lutheran churches, a brewery, a European-style spa resort called Hilgen Spring Park, and many German cultural associations, including two Turner societies.

Cedarburg changed significantly during the period of post-World War II suburbanization. While the mills had all closed by the 1960s, the city experienced rapid population growth and the development of new commercial properties and housing subdivisions. In spite of the changes, more than 200 of Cedarburg's historic buildings have been preserved, and the city is home to eight listings on the National Register of Historic Places. The community profits from a vibrant tourist industry and hosts festivals and events throughout the year that attract visitors from other areas.