The Thirteenth Wisconsin Legislature convened from January 11, 1860, to April 2, 1860, in regular session.
Senators representing even-numbered districts were newly elected for this session and were serving the first year of a two-year term.
Assembly members were elected to a one-year term.
Senators representing odd-numbered districts were serving the second year of their two-year term, having been elected in the general election held on November 2, 1858.
[1] The governor of Wisconsin during this entire term was Republican Alexander Randall, of Waukesha County, serving the first year of his second two-year term, having won re-election in the 1859 Wisconsin gubernatorial election.