SR 344 was originally established, in 1935, originally routed from SR 45, west of Leetonia, to Columbiana.[2][3] Between 1979 and 1981, the route was extended to Salem along what was SR 558, SR 558 was also rerouted to the south along some of the former SR 344. In that same year, the highway was rerouted between former SR 558 and Leetonia along a previously unnumbered road.[4][5] No significant changes have taken place to this state route since 1981.[5][6]
^Ohio Department of Transportation (1979). Ohio Transportation Map(PDF) (Map). 1:554,400. Columbus: Ohio Department of Transportation. OCLC5673562, 7302607. Retrieved September 13, 2013.
^ abOhio Department of Transportation (1981). Ohio Transportation Map(PDF) (Map). 1:554,400. Columbus: Ohio Department of Transportation. OCLC5673562, 35823444. Retrieved September 13, 2013.