Previous politicians of a specific numbered district have represented a different geographic area, due to redistricting.

As of 1862, the Senate expanded to 33 seats, a size it would retain well into the 21st century; the 1st District remained unchanged.

Kewaunee was later re-added and Oconto removed in 1892—this district remained consistent for thirty years.

In 1922, the district moved to roughly its present boundaries when Marinette was removed and Manitowoc county was re-added.

From 1972 to 2012 the district has been edited 6 times adding and removing small portions of Brown, Calumet, Fond du Lac, Manitowoc, and Outagamie counties.