U.S. Route 77 in Iowa

U.S. Highway 77
Wesley Parkway
US 77 highlighted in red
Route information
Maintained by Iowa DOT
Length	0.314 mi[2] (505 m)
Existed	1929[1]–present
History	Extended into South Dakota: 1929–mid-1980s
Major junctions
South end	US 77 at the Missouri River at Sioux City
North end	I-29 in Sioux City
Location
Country	United States
State	Iowa
Counties	Woodbury
Highway system
United States Numbered Highway System List Special Divided Iowa Primary Highway System Interstate US State Secondary Scenic
← Iowa 76 → Iowa 78

U.S. Highway 77 (US 77) is the shortest U.S. Highway in the state of Iowa. It crosses into Iowa over the Missouri River from South Sioux City, Nebraska, at Sioux City and runs approximately three-tenths mile (500 m) to an interchange with Interstate 29 where the road continues north as Wesley Parkway. Like all other state highways in Iowa, the route is maintained by the Iowa Department of Transportation.

US 77 has never been a long route in Iowa. When it was extended into the state in 1929, it only traveled 6 miles (9.7 km) in Sioux City before crossing the Big Sioux River into South Dakota. After I-29 was built in Sioux City during the late 1950s, US 77 was moved onto the new Interstate Highway. At both historic ends of the highway in Iowa, bridge failures have caused US 77 to be detoured around Sioux City. In the mid-1980s, the national end of the highway was moved to the interchange with I-29.