| State: | WI |
| Type: | WI |
| Route: | 56 |
| Length Mi: | 50.56 |
| Length Ref: | [1] |
| Map Custom: | yes |
| Map Notes: | WIS 56 highlighted in red |
| Length Round: | 2 |
| Direction A: | West |
| Direction B: | East |
| Terminus A: | in Genoa |
| Junction: | in Viroqua |
| Terminus B: | in Richland Center |
| Counties: | Vernon, Richland |
| Previous Type: | WI |
| Previous Route: | 55 |
| Next Type: | WI |
| Next Route: | 57 |
State Trunk Highway 56 (often called Highway 56, STH-56 or WIS 56) is a state highway in the U.S. state of Wisconsin. It runs east - west in southwest Wisconsin from just north of Richland Center to Genoa. On some maps, it is listed as ending inside Richland Center, instead of just north of it.
In Genoa, Wisconsin, WIS 56 begins at a non-signaled intersection with WIS 25, going northerly through town, before climbing the hill on the west side of town, not far from La Crosse Boiling Water Reactor. It winds its way and down several ridges, passing through the hamlet of Romance. WIS 56 then climbs onto a ridge, that takes it into Viroqua. WIS 56 enters Viroqua on Broadway Street, makes a right onto Hillyer Street, and rounds a corner onto Decker Street. At US Highway 14 (US 14), US 61, WIS 27, and WIS 82, WIS 56 encounters its only signalized intersection.
After crossing the highways, WIS 82 merges with WIS 56. This concurrency lasts for 4miles. When this concurrency ends, WIS 56 continues straight along the road to Viola, Wisconsin. WIS 82 makes a 90° turn to the north.
After leaving WIS 82, WIS 56 climbs up, and then down Pea Vine Hill. It then traverses the hamlet of Liberty. About 6miles later, it enters the village of Viola, Wisconsin. WIS 56 then meets up with WIS 131, another concurrency. In downtown Viola, WIS 131/WIS 56 crosses the Vernon County line for WIS 56's first time. WIS 56 then continues straight, while WIS 131 turns northerly. WIS 56 continues south-south-easterly until its end at WIS 80.