Ohio State Route 209
|Maintained by ODOT|
|Length:||16.63 mi (26.76 km)|
|Existed:||1923 – present|
|West end:||SR 83 near New Concord|
|I-70 in Cambridge|
|East end:||I-77 / SR 821 in Byesville|
State Route 209 (SR 209, OH 209) is an east–west state highway in eastern Ohio, a U.S. state. The western terminus of State Route 209 is at a T-intersection with State Route 83 approximately 3.75 miles (6.04 km) north of New Concord. State Route 209's eastern terminus is concurrent with the northern terminus of State Route 821 at Interstate 77 at its Exit 41 in Byesville, just 2.25 miles (3.62 km) southeast of the Interstate's interchange with Interstate 70.
Route description 
State Route 209 traverses a small portion of northeastern Muskingum County and a good part of the western half of Guernsey County. No segment of this highway is included within the National Highway System, a network of routes deemed to be most important for the nation's economy, mobility and defense.
|This section requires expansion. (January 2011)|
When it made its debut in 1923, State Route 209 ran along its present alignment from its current western terminus at what was then designated State Route 76 (now State Route 83) north of New Concord to downtown Cambridge. By 1959, with the transferring of U.S. Route 21 onto a new alignment from Byesville north that passes to the east of Cambridge along what is now the alignment of Interstate 77, State Route 209 was extended southeasterly from Cambridge to its present eastern terminus in Byesville along the former alignment of U.S. Route 21.
Major intersections 
||Highland Township||0.00||0.00||SR 83||Western terminus at T-intersection.|
||Adams Township||3.86||6.21||SR 662 north||T-intersection marking SR 662's southern terminus.|
|7.19||11.57||SR 658 north||T-intersection serving as southern terminus of SR 658.|
|Cambridge||9.84||15.84|| US 22 west
US 40 west
|Signalized intersection marking western split of US 22/US 40/SR 209 triplex.
The US 22/US 40 duplex joins from the west.
|10.12||16.29|| US 22 east
US 40 east
|Signalized T-intersection marking eastern split of US 22/US 40/SR 209 triplex.
The US 22/US 40 duplex departs to the east.
|Cambridge Township||12.18||19.60||I-70||Exit 178 off of I-70, a four-ramp interchange featuring diamond ramps on the north side and parclo-A ramps on the south side.|
|Jackson Township||13.40||21.57||SR 660 west||Signalized T-intersection serving as SR 660's eastern terminus.|
|Byesville||15.91||25.60||SR 821 south||Signalized intersection marking western split of SR 209/SR 821 duplex.
SR 821 joins from the south.
|16.63||26.76||I-77||Eastern terminus at Exit 41 off of I-77, a four-ramp interchange featuring diamond ramps on the west side and parclo-A ramps on the east side.
Interchange doubles as SR 821's northern terminus.
- Ohio Department of Highways and Public Works (April 1922) (MrSID). Map of Ohio State Highways (Map). Cartography by ODHPW. http://www.dot.state.oh.us/Divisions/TransSysDev/Innovation/prod_services/Documents/StateMaps/otm1922a.sid. Retrieved 2011-01-18.
- Ohio Department of Highways and Public Works (July 1923) (MrSID). Map of Ohio Showing State Routes (Map). Cartography by ODHPW. http://www.dot.state.oh.us/Divisions/TransSysDev/Innovation/prod_services/Documents/StateMaps/otm1923a.sid. Retrieved 2011-01-18.
- Ohio Department of Transportation. "Technical Services Straight Line Diagrams". Retrieved 2011-01-18.
- Federal Highway Administration (December 2003) (PDF). National Highway System: Ohio (Map). http://www.fhwa.dot.gov/planning/nhs/maps/oh/oh_Ohio.pdf. Retrieved 2011-01-18.
- Ohio Department of Highways (1958) (MrSID). Ohio Highway Map (Map). Cartography by ODOH. http://www.dot.state.oh.us/Divisions/TransSysDev/Innovation/prod_services/Documents/StateMaps/otm1958a.sid. Retrieved 2011-01-18.
- Ohio Department of Highways (1959) (MrSID). Ohio Highway Map (Map). Cartography by ODOH. http://www.dot.state.oh.us/Divisions/TransSysDev/Innovation/prod_services/Documents/StateMaps/otm1959a.sid. Retrieved 2011-01-18.