Iowa Highway 107 (Iowa 107) was a 32-mile-long (51 km) state highway in north central Iowa. It began south of Alexander at an intersection with Iowa 3 and ended at U.S. Route 18 (US 18) in Clear Lake. The highway was designated in 1920 as a spur route connecting Thornton to US 18, then Primary Road No. 19 (PR No. 19). After Interstate 35 (I-35) was completed through northern Iowa, Iowa 107's role in the primary highway system began to diminish. Portions of the route were removed from the system altogether. In 2003, the majority of the route was turned over to Franklin and Cerro Gordo counties. The only remaining segments were 1 mile (1.6 km) and 1+1⁄2 miles (2.4 km) in length, each segment wholly within the city limits of Meservey and Thornton. After it was discovered that the two segments