The district was created in the 1972 redistricting act (1971 Wisc. Act 304) which first established the numbered district system, replacing the previous system which allocated districts to specific counties.[5] The 90th district was drawn almost exactly in line with the previous Brown County 1st district (most of the city of Green Bay). The last representative of the Brown County 1st district, Jerome Quinn, went on to win the 1972 election as the first representative of the 90th Assembly district.[6] The district has remained centered on the city of Green Bay in all of the various redistricting schemes since 1972, with the exception of the 1982 court-ordered plan which temporarily moved the district to the area of central Fond du Lac and Winnebago counties. Generally, the city of Green Bay was divided between the 88th and 90th districts, with both districts containing city and suburban precincts, making both districts competitive. That changed in the 2011 redistricting act, which packed more of Green Bay into the 90th district.
Notable former representatives of the 90th district include Eric Genrich, the current mayor of Green Bay.
^ abTheobald, H. Rupert; Robbins, Patricia V., eds. (1972). "Biographies". The state of Wisconsin 1973 Blue Book (Report). State of Wisconsin. p. 81. Retrieved June 5, 2023.
