Ohio State Route 12
|Maintained by ODOT|
|Length:||60.97 mi (98.12 km)|
|Existed:||1923 – present|
|West end:||SR 115 / SR 189 in Vaughnsville|
|I‑75 / SR 15 in Findlay|
|East end:||SR 53 near Fremont|
|Counties:||Putnam, Allen, Hancock, Seneca, Sandusky|
From Vaughnsville, SR 12 travels northeast through the small towns of Columbus Grove, Pandora, and Benton Ridge before entering Findlay. Through Findlay, it shortly shares a route with US 224. After exiting Findlay, it continues on a northeast heading, passing through Arcadia, Fostoria, and Bettsville before ending at SR 53.
State Route 12's original routing in 1923 had it end in Findlay at its western terminus, and its eastern terminus extended from Fremont on U.S. Route 6's current route, going through Sandusky before ending in Cleveland.
In 1926, its eastern terminus was moved into Sandusky; its route to Cleveland was replaced with State Route 2.
When U.S. Route 6 was certified in 1932, State Route 12 was rerouted through the town of Castalia, ending in Sandusky. On this route, State Route 12 shared a route with State Route 101 from Castalia to Sandusky.
In 1938, State Route 12's western terminus was moved to U.S. Route 30N near Delphos, replacing the remaining section of State Route 106. This terminus was moved to Vaughnsville in 1971, when U.S. Route 30N (the modern routing of U.S. Route 30) moved off the Lincoln Highway.
In 1969, State Route 12's eastern terminus was moved to its current terminus. The section of road between Fremont and State Route 101 that was formerly State Route 12 was recertified as State Route 412.
|Putnam||Sugar Creek Township||0.00||0.00||SR 115 (Water Street) / SR 189 west||Eastern terminus of SR 189|
||No major junctions|
|Putnam||Columbus Grove||5.21||8.38||SR 65 (Veterans Highway)|
|Riley Township||10.45||16.82||SR 696 south / CR 6||Northern terminus of SR 696|
|Hancock||Union Township||19.24||30.96||SR 235 south||Western end of SR 235 concurrency|
|Benton Ridge||21.50||34.60||SR 235 north||Eastern end of SR 235 concurrency|
|Findlay||28.15||45.30||I‑75 / SR 15 – Dayton, Toledo||Exit 157 (I-75)|
|29.37||47.27||SR 37 east / SR 568 east (South Main Street) / East Main Cross Street||Western end of SR 37 concurrency; western terminus of SR 568|
|29.72||47.83||US 224 west (North Main Street) / SR 37 end||Western end of US 224 concurrency; western terminus of SR 37|
|30.81||49.58||US 224 east (Tiffin Avenue)||Eastern end of US 224 concurrency|
|Seneca||Fostoria||44.24||71.20||US 23 south / SR 18 east / SR 199 south (Lytle Street)||Western end of US 23 / SR 18 / SR 199 concurrency|
|44.56||71.71||US 23 north / SR 18 west / SR 199 north (South Street)||Eastern end of US 23 / SR 18 / SR 199 concurrency|
|Liberty Township||53.20||85.62||SR 635 south – Bascom||Western end of SR 635 concurrency|
|53.45||86.02||SR 635 north – Kansas||Eastern end of SR 635 concurrency|
|Bettsville||56.40||90.77||SR 590 north (Union Street)||Southern terminus of SR 590|
|Sandusky||Ballville Township||60.97||98.12||SR 53 / CR 201|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
Truck Route 12
SR 12 has a corresponding special route, Truck Route 12, that bypasses Findlay. The 7.2-mile-long (11.6 km) truck route begins at State Route 12's interchange with Interstate 75 on the west side of Findlay. It heads north on I-75 to its interchange with Hancock County Road 99, where it exits and moves east along that road, CR 212, and Bright Road. It then moves south along Bright Road to reconnect with SR 12 on the east side of Findlay.
- Ohio Department of Transportation. "Technical Services Straight Line Diagrams".
- Ohio Department of Transportation (1967). Ohio State Map (Map).
- Ohio Department of Transportation (1969). Ohio State Map (Map).
- Google Inc. "Ohio State Route 12". Google Maps (Map). Cartography by Google, Inc. https://maps.google.com/maps?saddr=W+Main+Cross+St&daddr=41.0843341,-83.6348727+to:Fostoria+Ave&hl=en&ll=41.06421,-83.643122&spn=0.055913,0.111494&sll=41.063822,-83.611107&sspn=0.055654,0.111494&geocode=FdM_cgIdrT0D-w%3BFa7lcgIdSNUD-ykbZ2Bs9ao-iDHwpT3tOYjvSg%3BFTSDcgIdoh4E-w&mra=dpe&mrsp=1&sz=14&via=1&t=m&z=14. Retrieved November 28, 2013.