State Highway 113 is a 18.8 mi (30.3 km) long state highway in northeastern Colorado.

SH 113 begins in the south at a junction with U.S. Highway 138 approximately nine miles northeast of Sterling and proceeds north for almost sixteen miles before passing though the small town of Peetz and continuing a further three miles (5 km) to the Nebraska state line where the road becomes Nebraska Highway 19.

The route was established in the 1920s with its current routing from U.S. Route 138 to Nebraska Highway 19 at the Nebraska state line. The route was entirely paved by 1939. Since then, there have been no major alignment changes in the routing.

The entire route is located in Logan County, Colorado.