State Trunk Highway 45 (often called Highway 45, STH-45 or WIS 45) was a number assigned to two different state highways in the U.S. state of Wisconsin:
- Highway 45 from 1917 to 1923, along the current route of U.S. Highway 63 from Red Wing, Minnesota to Ellsworth, WIS 65 and WIS 35 up to Hudson
- Highway 45 from 1923 to 1934, currently routed as Highway 34
- For the highway in Wisconsin numbered 45 since 1934, see U.S. Highway 45.
.svg) State Trunk Highway 45 | ||||
|---|---|---|---|---|
| Route information | ||||
| Maintained by WisDOT | ||||
| Existed | 1918–1934 | |||
| Location | ||||
| Country | United States | |||
| State | Wisconsin | |||
| Highway system | ||||
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