Ohio State Route 251

State Route 251 (SR 251) is a north–south state highway located in the southwestern portion of the U.S. state of Ohio. Its southern terminus is at U.S. Route 50 (US 50) about one mile (1.6 km) south of St. Martin in northern Brown County. The northern terminus of SR 251 is at US 68 nearly two and a half miles (4.0 km) northwest of St. Martin in southwestern Clinton County.

State Route 251
Route information
Maintained by ODOT
Length	4.81 mi[1] (7.74 km)
Existed	1925[2][3]–present
Major junctions
South end	US 50 near St. Martin
North end	US 68 near St. Martin
Location
Country	United States
State	Ohio
Counties	Brown, Clinton
Highway system
Ohio State Highway System Interstate US State Scenic
← SR 250 → SR 252

Route description

The path of SR 251 takes it through northern Brown County and southwestern Clinton County. SR 251 is not included as a component of the National Highway System.^[4]

History

When it was designated in 1925, SR 251 was routed along what is now US 68 between US 50 in Fayetteville and the current northern terminus of SR 251 south of St. Martin. US 68's predecessor, SR 53, concurrent with US 50 east to the current southern terminus of SR 251, and then followed the entire present alignment of SR 251 before resuming its northward path along the current alignment of US 68.^[2][3] In 1930, SR 251 and SR 53 swapped alignments, such that SR 53 now followed a straight alignment north out of Fayetteville that US 68 utilizes today, and SR 251 now appeared along its present-day routing.^[5][6]

Major intersections

County	Location	mi[1]	km	Destinations	Notes
Brown	Perry Township	0.00	0.00	US 50 / Murray Corner Road
		2.64	4.25	SR 123	Southern terminus of SR 123
Clinton	Jefferson Township	4.81	7.74	US 68 – Fayetteville, Wilmington
1.000 mi = 1.609 km; 1.000 km = 0.621 mi