Ohio State Route 31

State Route 31
Route information
Maintained by ODOT
Length:	32.12 mi[2] (51.69 km)
Existed:	1926[1] – present
Major junctions
South end:	SR 38 in Marysville
North end:	US 68 in Kenton
Location
Counties:	Union, Hardin
Highway system
Ohio highways Interstates • U.S. Routes • State Routes ← SR 29 SR 32 →

Southern terminus in Marysville.

Near the northern terminus in Kenton.

State Route 31 is an Ohio state highway that currently runs from Marysville to Kenton. Before 1938, however, it stretched far longer, from Pomeroy on the Ohio River to Findlay.

Route description

History

• 1924: Route 21 established from Pomeroy to Findlay.^[3][4]
• 1926: Route 21 renumbered as SR 31 to avoid confusion with US 21.^[1][3]
• 1932: SR 10 assigned concurrently with SR 31 from Kenton to Findlay.^[1]
• 1933: SR 10 replaced with US 68.^[1]
• 1938: US 33 established along SR 31 between Marysville and Marble Cliff, and between Columbus and Pomeroy. SR 31 truncated to new southern terminus at Columbus.^[1]
• 1943: SR 31 truncated to new southern terminus at Marysville, eliminating US 33 concurrency.^[1]
• 1952: SR 31 truncated to new northern terminus at Kenton, eliminating US 68 concurrency.^[1]

Major intersections

County	Location	Mile	Destinations	Notes
Union	Marysville	0.0	SR 38	Northern terminus of SR 38
		0.4	Main Street	Former routing of SR 4
		1.4	US 33 US 36 SR 4
	Broadway	7.8	SR 347
	Summersville	11.9	SR 47
	Byhalia	15.6	SR 739
		16.2	SR 739
Hardin	Mount Victory	2.4	SR 273	eastern terminus of SR 273
	Kenton	10.2	SR 292	northern terminus of SR 292
		11.1	SR 53
		11.5	SR 309
		11.6	SR 67
		11.7	SR 53
		11.8	US 68
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

1. ^ ^{a b c d e f g} Route 31 John Simpson's Unofficial Ohio State Highways Web Site
2. ^ All mileages from ODOT Straight Line Diagrams unless otherwise noted.
3. ^ ^{a b} Explanation of the Ohio State Highway System John Simpson's Unofficial Ohio State Highways Web Site
4. ^ Route 21 John Simpson's Unofficial Ohio State Highways Web Site