{{Short description|State highway in Washington County, Ohio, US}} {{Use American English|date=May 2025}} {{Use mdy dates|date=January 2025}} {{Infobox road |state=OH |type=SR |route=618 |map=OH 618 map.svg |maint=ODOT |length_mi=7.45 |length_round=2 |length_ref=<ref name="SLD_618WAS">{{cite web |url=http://www.odotonline.org/techservapps/SLD/pdf_files/wassr0618r.pdf |title=Technical Services Straight Line Diagrams: SR 618, Washington County |author=Ohio Department of Transportation |author-link=Ohio Department of Transportation |accessdate=2011-06-16 |archive-url=https://web.archive.org/web/20120325235656/http://www.odotonline.org/techservapps/SLD/pdf_files/wassr0618r.pdf |archive-date=2012-03-25 |url-status=dead }}</ref> |established=1937<ref name=ODOT1936_map /><ref name=ODOT1937_map /> |direction_a=West |terminus_a={{jct|state=OH|US|50|OH|7|OH|32}} near Belpre |junction= |direction_b=East |terminus_b={{jct|state=OH|OH|7}} in Belpre |counties=Washington |previous_type=SR |previous_route=617 |next_type=SR |next_route=619 }}
'''State Route 618''' ('''SR 618''') is a {{convert|7.45|mi|km|adj=on}} long east–west state highway in the southeastern quadrant of the U.S. state of Ohio. The western terminus of SR 618 is at an interchange with the concurrency of U.S. Route 50 (US 50), SR 7 and SR 32 about {{convert|3.25|mi|km}} west of Belpre. Its eastern terminus is in northern Belpre at an interchange with SR 7.
==Route description== All of SR 618 runs through the southwestern portion of Washington County. This highway is not included as a part of the National Highway System (NHS). The NHS is a system of routes deemed to be most important for the economy, mobility and defense of the country.<ref name="NHS">{{cite map | title=National Highway System: Ohio | date=December 2003 | publisher=Federal Highway Administration | url=http://www.fhwa.dot.gov/planning/nhs/maps/oh/oh_Ohio.pdf | archive-url=https://web.archive.org/web/20081016165827/http://www.fhwa.dot.gov/planning/nhs/maps/oh/oh_Ohio.pdf | url-status=dead | archive-date=October 16, 2008 | format=PDF|accessdate=2011-06-16}}</ref>
{{Expand section|date=June 2011}}
==History== SR 618 was applied in 1937. The highway was originally routed along what is now SR 7 and SR 32 and, in part, US 50, from the point that marks the western terminus of SR 618 into Belpre. Meanwhile, what is now designated as SR 618 was the routing of US 50 and SR 7 at the time.<ref name=ODOT1936_map>{{cite map |title=Official Ohio Highway Map |url=http://www.dot.state.oh.us/Divisions/TransSysDev/Innovation/prod_services/Documents/StateMaps/otm1936a.sid |format=MrSID |publisher=Ohio Department of Highways |date=1936 |cartography=ODOH |accessdate=2011-06-17}}</ref><ref name=ODOT1937_map>{{cite map |title=Official Ohio Highway Map |url=http://www.dot.state.oh.us/Divisions/TransSysDev/Innovation/prod_services/Documents/StateMaps/otm1937a.sid |format=MrSID |publisher=Ohio Department of Highways |date=1937 |cartography=ODOH |accessdate=2011-06-17}}</ref>
In 1965, SR 618 and US 50/SR 7 switched alignments. SR 618 was routed onto its present alignment, while US 50 and SR 7 was moved onto the former alignment of SR 618, which was widened into a four-lane divided highway simultaneous to the alignment swap.<ref name=ODOT1964_map>{{cite map |title=Official Ohio Highway Map |url=http://www.dot.state.oh.us/Divisions/TransSysDev/Innovation/prod_services/Documents/StateMaps/otm1964ar.sid |format=MrSID |publisher=Ohio Department of Highways |date=1964 |cartography=ODOH |accessdate=2011-06-17}}</ref><ref name=ODOT1965_map>{{cite map |title=Official Ohio Highway Map |url=http://www.dot.state.oh.us/Divisions/TransSysDev/Innovation/prod_services/Documents/StateMaps/otm1965a.sid |format=MrSID |publisher=Ohio Department of Highways |date=1965 |cartography=ODOH |accessdate=2011-06-17}}</ref>
==Major intersections== {{OHinttop|length_ref=<ref name="SLD_618WAS"/>|county=Washington}} {{OHint |type=incomplete |ctdab=Washington |township=Belpre |lspan=2 |mile=0.00 |road={{jct|state=OH|US|50|OH|7|OH|32|dir1=west|dir2=south|dir3=west|city1=Pomeroy|city2=Athens}} |notes=Interchange; no access to US 50 eastbound / from US 50 westbound}} {{OHint |mile=1.41 |road={{jct|state=OH|OH|339|dir1=North|city1=Barlow}} |notes=Southern terminus of SR 339}} {{OHint |location=Belpre |lspan=3 |mile=6.23 |type=concur |road={{jct|state=OH|OH|32|dir1=East|name1=Parkersburg–Belpre Bridge}} to {{jct|state=WV|WV|68|I|77|city1=Parkersburg}} |notes=Western end of SR 32 concurrency }} {{OHint |mile=7.00 |type=concur |road={{jct|state=OH|OH|32|dir1=West|to2=yes|SR|7|US|50|dir2=south|road|Memorial Bridge}} |notes=Eastern end of SR 32 concurrency}} {{OHint |type=incomplete |mile=7.45 |road={{jct|state=OH|OH|7|dir1=north|city1=Marietta}} |notes=Interchange; no access to SR 7 southbound / from SR 7 northbound}} {{OHintbtm|keys=concur,incomplete}}
==References== {{Attached KML|display=title,inline}} {{Portal|Ohio|U.S. Roads}} {{Reflist}}
618 Category:Transportation in Washington County, Ohio Category:U.S. Route 50