Wisconsin Highway 166
| Fond du Lac Avenue | ||||
| Route information | ||||
| Length | 2.1 mi (3.4 km) | |||
| Existed | 1927–1953 | |||
| Major junctions | ||||
| South end | US 45 / WIS 55 | |||
| North end | WIS 74 in Menomonee Falls | |||
| Location | ||||
| Country | United States | |||
| State | Wisconsin | |||
| Highway system | ||||
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Wisconsin Highway 166 (WIS 166) was a state highway in the Milwaukee metropolitan area in Wisconsin. The route traveled in a southeast–northwest direction from US 45/WIS 55 to WIS 74 in Menomonee Falls (now just Main Street). WIS 166 was removed in 1953 when US 41 moved over.