Ohio State Route 503

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State Route 503

Route information
Maintained by ODOT
Length40.53 mi[1] (65.23 km)
Major junctions
South end US 127 in Seven Mile
Major intersections US 35 in West Alexandria
I-70 in Lewisburg
US 40 in Lewisburg
North end SR 121 in Wayne Lakes
CountryUnited States
CountiesButler, Preble, Darke
Highway system
  • Ohio State Highway System
SR 502 SR 504

State Route 503 (SR 503) is a north–south state highway in the southwestern quadrant of the U.S. state of Ohio. The southern terminus of SR 503 is at U.S. Route 127 (US 127) in Seven Mile. Its northern terminus is at a T-intersection with SR 121 on the eastern limits of the village of Wayne Lakes.

Route description

Entering Ithaca from the north

Along its way, SR 503 travels through northern Butler County, eastern Preble County and southern Darke County. There are no segments of SR 503 that are included as a part of the National Highway System.[4]


The SR 503 designation was assigned in 1937. The highway was established along the routing that it maintains to this day between US 127 in Seven Mile and SR 121 in Wayne Lakes. No changes of major significance have taken place to the routing of the highway since its inception.[2][3]

Major intersections

ButlerSeven Mile0.000.00 US 127 (Main Street) / Mill Road – Hamilton
Wayne Township0.971.56 SR 73 (Trenton Oxford Road) – Trenton, Oxford
4.617.42 SR 744 (Somerville Jacksonburg Road) – Somerville, Jacksonburg
PrebleGratis12.1919.62 SR 725 (South Street)
12.2619.73 SR 122 (Franklin Street)
West Alexandria19.1630.84 US 35 (Dayton Street)
Harrison Township25.6041.20 I-70 – Columbus, IndianapolisExit 14 (I-70)
Lewisburg26.8343.18 US 40 (Cumberland Street)
SR 722 east (Cross Street)
Southern end of SR 722 concurrency
Twin Township32.8552.87
SR 722 west
Northern end of SR 722 concurrency
Butler Township38.9462.67 US 127 – Castine, Greenville
Wayne Lakes40.5365.23 SR 121 – New Madison, Fort Jefferson, Greenville
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b Ohio Department of Transportation. "Technical Services Straight Line Diagrams". Retrieved 2011-02-26.
  2. ^ a b Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1936. Retrieved 2011-02-25.
  3. ^ a b Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1937. Retrieved 2011-02-25.
  4. ^ National Highway System: Ohio (PDF) (Map). Federal Highway Administration. December 2003. Retrieved 2011-02-25.