Interstate 35 in Iowa

Interstate 35
Iowa's Interstate Highways with I-35 highlighted in red.
Route information
Maintained by Iowa DOT
Length:	219.225 mi (352.808 km)
Existed:	ca. September 21, 1958 – present
History:	Under construction 1958–1975
Major junctions
South end:	I-35 near Lamoni, Iowa
	US 34 at Osceola Iowa 5 at West Des Moines I-80 / I-235 near Des Moines US 30 at Ames US 20 near Williams US 18 / Iowa 27 near Northwood
North end:	I-35 towards Minneapolis-St. Paul
Location
Counties:	Decatur Clarke Warren Polk Story Hamilton Wright Franklin Cerro Gordo Worth
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Iowa Primary Highway System Interstate U.S. State Secondary Scenic ← US 34 Iowa 37 →

Interstate 35 (I-35) is a north–south Interstate Highway in the United States that runs from Laredo, Texas, to Duluth, Minnesota. In Iowa, the highway runs from south to north through the center of the state, roughly parallel to U.S. Highway 69 (US 69) and US 65. It enters the state near Lamoni from Missouri and continues north through the southern Iowa drift plain. In the Des Moines area, I-35 is overlapped by I-80 and the two routes bypass Des Moines to the west and north. I-235, the only auxiliary route of I-35, serves the suburbs and downtown Des Moines; it begins and ends at the two interchanges where I-35 and I-80 meet. Near Mason City and Clear Lake, US 18 and Iowa Highway 27 (Iowa 27) overlap with I-35. Shortly after, US 18 splits off to the west in Clear Lake, while Iowa 27 runs with I-35 until they reach the Minnesota state line.