The 1848 United States Senate election in Wisconsin was held in the 1st Wisconsin Legislature on This was the first U.S. Senate election held in Wisconsin after it was admitted to the Union on Former Wisconsin Territory legislator Isaac P. Walker and former Wisconsin Territory governor Henry Dodge were elected to Wisconsin's Class 3 and Class 1 seats, respectively, on a single ballot in which each Wisconsin legislator voted for two candidates.
In the 1848 legislative term, Democrats held large majorities in both chambers of the Wisconsin Legislature, so had more than enough votes to elect two Democratic United States senators.
The 1st Wisconsin Legislature took one vote for U.S. senators on the fourth day of the legislative session, Each member was allowed to vote for two candidates, with 79 members voting, five absent, and one vacant seat.