Iowa Highway 78

Iowa Highway 78
Iowa 78 highlighted in red
Route information
Maintained by Iowa DOT
Length	58.429 mi[1] (94.032 km)
Existed	1920s[2]–present
Major junctions
West end	Iowa 149 near Martinsburg
Major intersections	US 218 / Iowa 27 near Olds
East end	US 61 / CR H22 near Morning Sun
Location
Country	United States
State	Iowa
Counties	Keokuk Washington Jefferson Henry Louisa
Highway system
Iowa Primary Highway System Interstate US State Secondary Scenic
← US 77 → I-80

Iowa Highway 78 (Iowa 78) is a 59-mile-long (95 km) state highway which runs from east to west in southeastern Iowa. The route begins east of Martinsburg at Iowa Highway 149, and ends at U.S. Highway 61 east of Morning Sun. The route has existed since the 1920s, when it was a short spur route between Olds and Winfield. By the 1950s, the route reached its current extents.