U.S. Route 18

U.S. Route 18
U.S. Route 18
	US 18 highlighted in red
Route information
Length	1,046 mi (1,683 km)
Existed	1926[citation needed]–present
Major junctions
West end	I-25 / US 20 / US 26 / US 87 at Orin, WY
	I-29 near Worthing, SD; ; I-35 / Iowa 27 at Clear Lake, IA; ; US 218 / Iowa 27 near Charles City, IA; I-39 / I-90 at Madison, WI; I-94 at Waukesha, WI; I-41 / US 41 / US 45 at Wauwatosa, WI; I-43 at Milwaukee, WI;
East end	Lincoln Memorial Drive in Milwaukee, WI
Location
Country	United States
States	Wyoming, South Dakota, Iowa, Wisconsin
Highway system
	United States Numbered Highway System; List; Special; Divided;

U.S. Highway 18 (US 18) is an east–west United States Numbered Highway in the Midwestern United States. The western terminus is in Orin, Wyoming, at an interchange with Interstate 25 (I-25). Its eastern terminus is in Downtown Milwaukee, Wisconsin.^[1] US 18, however, runs concurrent with other U.S. Highways from its western terminus to Mule Creek Junction, Wyoming. US 18 is one of the original U.S. Highways of 1926. The US 18 designation was originally proposed for a road in Michigan from Grand Haven east to Detroit. This roadway was eventually designated as US 16.

^ Geelhart, Chris; Grier, Tom; Morrison, Jeff; Mortell, Robert; Sanderson, Dale; Summa, Michael (2023). "End of US highway 18". US Ends.com. Archived from the original on December 22, 2016. Retrieved October 6, 2014.