SR 105 was commissioned in 1923, routed from 4 miles (6.4 km) east of Bowling Green to Oak Harbor along its current alignment. Its western terminus was at then SR 34, later became U.S. Route 6 (US 6).[2][3] The entire route was paved by 1934.[4][5] Between 1967 and 1969, it was extended west to current western terminus, along the former US 6 alignment.[6][7]
^ abOhio Department of Highways and Public Works (July 1923). Map of Ohio Showing State Routes(PDF) (Map). 1:760,320. Columbus: Ohio Department of Highways and Public Works. Retrieved September 17, 2013.
^Ohio Department of Highways (1967). Official Highway Map(PDF) (Map). c. 1:563,200. Columbus: Ohio Department of Highways. OCLC5673562, 7444249. Retrieved September 17, 2013.
^Ohio Department of Highways (1969). Official Highway Map(PDF) (Map). c. 1:563,200. Columbus: Ohio Department of Highways. OCLC5673562, 7448779. Retrieved September 17, 2013.