This was also the first legislative session under the current legislative configuration, with 99 members of the Assembly and 33 state senators, with each senate district comprising three assembly districts.

Senators representing even-numbered districts were newly elected for this session and were serving the first two years of a four-year term.

Senators representing odd-numbered districts were serving the third and fourth year of a four-year term, having been elected in the general election of November 3, 1970.

[1] The governor of Wisconsin during this entire term was Democrat Patrick Lucey, of Crawford County, serving the second two years of a four-year term, having won election in the 1970 Wisconsin gubernatorial election.

This was probably the most important redistricting in state history, as it established the current system of representation, ending the process of allocating Assembly districts by county and creating each Senate district as a combination of three whole Assembly districts.