Prairie du Chien was incorporated as the Borough of Prairie des Chiens on September 17, 1821, by the secretary of the Michigan Territory.[13] It is the only municipality in Wisconsin other than Green Bay to have been known as a borough, rather than a city, town, or village.[14] The borough existed for a few years before the government stopped operating in 1825.[15]

In 1828, the Prairie du Chien area became a part of the Town of St. Anthony, which included all of Crawford County. (Crawford County itself included all of the western part of Michigan Territory.) In 1849, the Town of Prairie du Chien was created, consisting of most of present-day Crawford County. The city of Prairie du Chien was incorporated in 1872.[16]

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