From Iowa 3, the highway passed through Alexander, continued north along a flat area of northwestern Franklin County.

One mile (1.6 km) north of Meservey, the highway turned east towards Thornton, splitting from County Road S14 (CR S14).

[4] North of Thornton, Iowa 107 followed a straight highway that traveled over gently rolling hills and only passed a few houses until it reached Clear Lake.

[4] Designated in 1920, Iowa 107 originally was a spur highway connecting Thornton to Primary Road No.

[1] In 1935, 107 was extended west and south through Meservey and Alexander to Primary Road 10, now Iowa Highway 3.

Over 600 miles of roads, including the Franklin County portion of Iowa 107 was turned over to local jurisdictions on July 1, 2003.

In early 2010, the Cerro Gordo County Engineer sent letters of inquiry to the cities of Meservey and Thornton regarding their interest in taking over their segments of Iowa 107.