[1] Located in north-central Wisconsin, the district is entirely contained within Marathon County.

[6] The district has remained in the same vicinity, centered on Wausau and Schofield, in the various redistricting schemes since 1972, with the exception of the 1982 court-ordered plan which temporarily moved the district to eastern Waupaca County.

The 2011 redistricting act was the most significant change to the boundaries of the district since 1982, maintaining Wausau and Schofield in the district, but shifting away from the north-central towns of Marathon County to encompass more of the rural eastern half of the county.

Act 94) swapped out Schofield and a number of towns in favor of the neighboring village of Weston.

Notable former representatives of the 85th district include Tony Earl, who was later elected the 41st Governor of Wisconsin, and Gregory Huber, who was later appointed as a Wisconsin circuit court judge by Governor Jim Doyle and is now the current chief judge for the 9th judicial administrative district of Wisconsin.