Iowa Highway 57 is a state highway that runs from west to east in northern Iowa. Its western terminus is at U.S. Route 65 northeast of Iowa Falls. Its eastern terminus is at an intersection with U.S. Highway 218, Iowa Highway 27, and Iowa Highway 58 in Cedar Falls. It currently follows much of U.S. Highway 20's old route from Cedar Falls to Iowa Falls.

Quick Facts Route information, Length ...

Iowa Highway 57
Iowa 57 highlighted in red
Route information
Maintained by Iowa DOT
Length	43.765 mi[1] (70.433 km)
Major junctions
West end	US 65 / CR S45 near Iowa Falls
Major intersections	Iowa 14 at Parkersburg
East end	US 218 / Iowa 27 / Iowa 58 at Cedar Falls
Location
Country	United States
State	Iowa
Counties	Hardin Franklin Butler Grundy Black Hawk
Highway system
Iowa Primary Highway System Interstate US State Secondary Scenic
← Iowa 56 → Iowa 58

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Iowa Highway 57 begins at US 65 northeast of Iowa Falls and runs eastward along the Hardin County/Franklin County border. It goes through Ackley, then turns north shortly to go through Austinville. It turns eastward there and runs through Aplington before meeting Iowa 14 in Parkersburg. It continues east through New Hartford, then after a brief south turn, turns east to go through Cedar Falls. In the eastern part of Cedar Falls, near George Wyth Memorial State Park, Iowa Highway 57 ends when it meets US 218, Iowa 27, and Iowa 58.

At the time of designation, the highway went from Grundy Center northward to Cedar Falls. In August 1932, the segment from Grundy Center to Parkersburg was renumbered as Iowa 14. In 1986, when U.S. Highway 20 was expanded to four lanes to the Black Hawk/Grundy County line, Iowa 57 assumed 20's old route from Cedar Falls to Parkersburg. When the final four lane segment of U.S. 20 through the Iowa River Greenbelt opened on August 22, 2003, Iowa 57 was extended to cover the remainder of U.S. 20's old route to U.S. 65.