Wisconsin Highway 61

State Trunk Highway 61 (often called Highway 61, STH-61 or WIS 61) was a number assigned to a state highway in the U.S. state of Wisconsin. It traveled roughly along:

• present-day Wisconsin Highway 81 (WIS 81) from Cassville to Beloit. From 1924 to 1926, WIS 61 extended westward via present-day WIS 81.
• the pre-Interstate alignment of Wisconsin Highway 15 (WIS 15) from Beloit to Milwaukee (now part of CTH-X, WIS 11, WIS 67, US 12, CTH-ES, and National Avenue). WIS 61 had always follow at least a portion of what later became WIS 15. WIS 15 had plenty of alterations before being superseded by I-43 in 1988.

The route was later designated as Wisconsin Highway 14 from 1926 to 1933 (before US 14 exists).