U.S. Route 32 in Iowa

U.S. Highway 6
Grand Army of the Republic Highway
A map of Iowa's Interstates (blue) and US Highways (orange) with US 6 highlighted in red.
Route information
Maintained by Iowa DOT
Length:	322.655 mi (519.263 km)
Existed:	June 8, 1931 – present
Major junctions
West end:	I-480 / US 6 at Omaha, Nebr.
	I-29 in Council Bluffs I-80 / US 71 near Atlantic I-80 / US 169 at De Soto I-35 / I-80 in Clive I-235 in Des Moines I-80 / US 65 in Altoona I-80 / Iowa 14 in Newton US 151 at the Amana Colonies I-80 / Iowa 38 near Wilton I-280 / US 61 at Davenport
East end:	I-74 / US 6 at Moline, Ill.
Location
Counties:	Pottawattamie Cass Adair Madison Dallas Polk Jasper Poweshiek Iowa Johnson County Muscatine Cedar Scott
Highway system
United States Numbered Highway System List Special Divided Replaced Iowa Primary Highway System Interstate U.S. State Secondary Scenic ← Iowa 5 Iowa 7 → ← Iowa 31 US 32 Iowa 32 →

U.S. Highway 6 (US 6) is an east–west U.S. Highway which runs 319 miles (513 km) across the U.S. state of Iowa. The route is signed in places as the Grand Army of the Republic Highway. Like all state highways in Iowa, it is maintained by the Iowa Department of Transportation. The route begins at the Missouri River crossing at Council Bluffs. From there, it travels east through Oakland and Atlantic. North of Atlantic, the highway overlaps Interstate 80 (I-80) until De Soto. Between De Soto and Adel, the highway overlaps US 169 before splitting off to the east towards Des Moines. Through the Des Moines area, the highway runs about one mile (1.6 km) north or south of the I-35 / I-80 corridor.

At Altoona, the route again overlaps I-80 until Newton, where it splits away from I-80. The highway passes near or through the cities of Kellogg, Grinnell, Victor, Marengo, the Amana Colonies, and Tiffin before entering the Coralville / Iowa City area. Through Coralville and Iowa City, US 6 has no direct access to I-80, I-380, or US 218; other routes like Iowa Highway 1 (Iowa 1) and Iowa 965 provide direct access. From Iowa City, the highway heads to the east-southeast through West Liberty and Atalissa. Near Wilton, the route heads north to I-80 where it again overlaps to Davenport. At Davenport, US 6 then follows I-280 and US 61 before entering the city. On the eastern side of Davenport, it joins I-74 and enters Bettendorf before leaving Iowa for Illinois.