Wisconsin Highway 109

State Trunk Highway 109
Route information
Maintained by WisDOT
Length	19.24 mi (30.96 km)
Existed	1923–1998
Major junctions
South end	WIS 67 west of Woodland
North end	WIS 16 in Watertown
Location
Country	United States
State	Wisconsin
Counties	Jefferson, Dodge
Highway system
Wisconsin State Trunk Highway System Interstate US State Scenic Rustic
← WIS 108 → WIS 110

State Trunk Highway 109 (often called Highway 109, STH-109 or WIS 109) was a 19.24-mile (30.96 km) state highway in southeastern Dodge County, Wisconsin, United States, that ran north–south between Woodland and Watertown.