Interstate 29 in Iowa

Interstate 29
I-29 highlighted in red
Route information
Maintained by Iowa DOT
Length	151.826 mi[1] (244.340 km)
Existed	October 1, 1958 (1958-10-01)[2]–present
History	Under construction 1958–1972
Tourist routes	Lewis and Clark Trail
NHS	Entire route
Major junctions
South end	I-29 near Hamburg
Major intersections	US 34 / US 275 near Glenwood US 275 at Council Bluffs I-80 at Council Bluffs I-480 / US 6 at Council Bluffs I-680 near Crescent I-880 in Loveland US 30 at Missouri Valley I-129 / US 20 / US 75 at Sioux City US 77 at Sioux City
North end	I-29 at Sioux City
Location
Country	United States
State	Iowa
Counties	Fremont Mills Pottawattamie Harrison Monona Woodbury
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Iowa Primary Highway System Interstate US State Secondary Scenic
← Iowa 28 → US 30

In the US state of Iowa, Interstate 29 (I-29) is a north–south Interstate Highway which closely parallels the Missouri River. I-29 enters Iowa from Missouri near Hamburg and heads to the north-northwest through the Omaha–Council Bluffs and the Sioux City areas. It exits the state by crossing the Big Sioux River into South Dakota. For its entire distance through the state, it runs on the flat land between the Missouri River and the Loess Hills.

I-29 was built in sections over a period of 15 years. When there was a shortage of male workers, female workers stepped in to build a 20-mile (32 km) section near Missouri Valley. Between Council Bluffs and Sioux City, I-29 replaced U.S. Highway 75 (US 75) as the major route in western Iowa. As a result of I-29's creation, US 75 south of Sioux City was relocated into Nebraska.