Ohio State Route 203

State Route 203
Route information
Maintained by ODOT
Length:	22.10 mi[1][2] (35.57 km)
Existed:	1923[3][4] – present
Major junctions
South end:	SR 37 near Delaware
North end:	SR 309 near Marion
Location
Counties:	Delaware, Marion
Highway system
Ohio Highways Interstate U.S. State Scenic ← SR 202 SR 204 →

SR 203 in rural western Marion County, looking south from the SR 95 intersection

State Route 203 (SR 203, OH 203) is a 22.14-mile (35.63 km) long north–south state highway in the central portion of the U.S. state of Ohio. The southern terminus of SR 203 is at a four-way stop intersection with SR 37 just 0.50 miles (0.80 km) northwest of the city limits of Delaware. Its northern terminus is at SR 309 approximately 4 miles (6.4 km) northwest of Marion.

Route description

SR 203 traverses the northwestern portion of Delaware County and the southern half of Marion County. There are no segments of SR 203 that are included within the National Highway System (NHS), a network of highways deemed to be most important for the economy, mobility and defense of the country.^[5]

History

SR 203 was established in 1923. The highway was originally routed along its current alignment between its present southern terminus, at the time designated as SR 47, and its junction with what is now SR 739, but in 1923 known as SR 38.^[3][4] In 1938, SR 203 was extended north to its present terminus at what is now SR 309, but at the time a part of the now-defunct U.S. Route 30S (US 30S).^[6][7]

Major intersections

County	Location	mi[1][2]	km	Destinations	Notes
Delaware	Radnor Township	0.00	0.00	SR 37 / South Section Line Road – Delaware, Magnetic Springs
Marion	Prospect	9.88	15.90	SR 47 (Water Street)
	Pleasant Township	12.34	19.86	SR 4 – Marion, Marysville
	Green Camp Township	16.84	27.10	SR 739 – Marion, Green Camp
	Big Island Township	20.28	32.64	SR 95 – Marion, LaRue
		22.10	35.57	SR 309 – Marion, Kenton
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

Route map: Bing / Google

1. Ohio Department of Transportation. "Technical Services Straight Line Diagrams: SR 203, Delaware County" (PDF). Retrieved 2011-08-11.
2. Ohio Department of Transportation. "Technical Services Straight Line Diagrams: SR 203, Delaware County" (PDF). Retrieved 2011-08-11.
3. Map of Ohio State Highways (MrSID) (Map). Cartography by ODHPW. Ohio Department of Highways and Public Works. April 1922. Retrieved 2011-08-11.
4. Map of Ohio Showing State Routes (MrSID) (Map). Cartography by ODHPW. Ohio Department of Highways and Public Works. July 1923. Retrieved 2011-08-11.
5. National Highway System: Ohio (PDF) (Map). Federal Highway Administration. December 2003. Retrieved 2011-08-11.
6. Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1937. Retrieved 2011-08-11.
7. Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1938. Retrieved 2011-08-11.