Wisconsin Highway 21

State Trunk Highway 21 marker
State Trunk Highway 21
Map
WIS 21 highlighted in red
Route information
Maintained by WisDOT
Length123.37 mi[1] (198.54 km)
Major junctions
West end WIS 16 / WIS 27 / WIS 71 in Sparta
Major intersections
East end US 45 in Oshkosh
Location
CountryUnited States
StateWisconsin
CountiesMonroe, Juneau, Adams, Waushara, Winnebago
Highway system
WIS 20 WIS 22

State Trunk Highway 21 (often called Highway 21, STH-21 or WIS 21) is a state highway in the U.S. state of Wisconsin. It runs east–west across the center of the state between Sparta and Oshkosh. The highway often serves as a direct route for travelers between Appleton and Oshkosh to Tomah and La Crosse. It is a two-lane surface road for nearly all of its length, with the exception of a few urban arterials of four or more lanes. The section of WIS 21 between Fort McCoy and I-94 in Tomah is classified as a "Major STRAHNET Connector", while the route past I-94 is classified as a "Non-Interstate STRAHNET Route".[1]

  1. ^ a b Bessert, Chris. "Highways 20–29". Wisconsin Highways. Retrieved March 20, 2007.[self-published source]