Iowa Highway 39 (Iowa 39) is a north–south state highway in western Iowa. It begins at an intersection with U.S. Route 59 and Iowa Highway 141 on the western edge of Denison. The route ends at its intersection with Iowa Highway 175 on the eastern side of Odebolt.

Quick Facts Route information, Existed ...

Iowa Highway 39
Iowa 39 highlighted in red
Route information
Maintained by Iowa DOT
Existed	January 1, 1969 (1969-01-01)–present
Major junctions
South end	US 59 / Iowa 141 in Denison
North end	Iowa 175 / CR M43 in Odebolt
Location
Country	United States
State	Iowa
Counties	Crawford, Sac
Highway system
Iowa Primary Highway System Interstate US State Secondary Scenic
← Iowa 38 → Iowa 44

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Iowa 39 begins on the west side of Denison, Iowa at an intersection with U.S. Highway 59 and Iowa Highway 141. Heading north-northwest, it runs parallel to the Boyer River between Denison and Deloit.^[1] At Deloit, the route straightens northward and travels 7 miles (11 km) to Kiron. North of Kiron, it turns east for 4 miles (6.4 km) before turning back to the north for 7 miles (11 km).^[2] The route ends at Iowa Highway 175 in Odebolt.

Prior to 1969, the route that is now designated as Iowa 39 was designated as Iowa Highway 4.^[3] This version of Iowa 4 once connected Hamburg and Spirit Lake along the current routings of U.S. Route 275, U.S. Highway 59, and U.S. Highway 71.^[4] In 1969, when many routes were renumbered, Iowa 4 was redesignated as Iowa Highway 39.^[5]