|James A. Rhodes Appalachian Highway|
Route of SR 32 in southern Ohio highlighted in red
|Maintained by ODOT|
|Length||182.71 mi  (294.04 km)|
|West end||US 50 in Cincinnati|
|I-275 in Union Township US 50 / SR 32 / SR 7 in Coolville|
|East end||WV 618 on Parkersburg-Belpre Bridge in Belpre|
State Route 32, also known as SR 32 and the James A. Rhodes Appalachian Highway,  is a major east–west highway across the southern portion of the U.S. state of Ohio. It is the eighth longest state route in Ohio. It leads from eastern Cincinnati, near the border between the neighborhoods of Linwood, Mount Lookout, and Columbia-Tusculum, to the Parkersburg-Belpre Bridge across the Ohio River in Belpre.
Except in Belpre, leading up to the bridge into West Virginia, the entire route outside Cincinnati's beltway ( Interstate 275) is a high-speed four-lane divided highway, forming the Ohio portion of Corridor D of the Appalachian Development Highway System. This corridor continues east across the Ohio River over the Blennerhassett Island Bridge.
The Batavia Turnpike and Miami Bridge Company was incorporated and chartered by the state of Ohio. It built a road, which was "about finished" as of 1841, beginning at the Wooster Turnpike (Eastern Avenue), crossing the Little Miami River on the Union Bridge, and turning east to Batavia.   The Ohio Turnpike to Bethel split after the Little Miami was crossed.
The passage of the McGuire Bill in 1911 led to the designation of a large number of Inter-County Highways to be maintained by the Ohio Department of Highways.  This network included the Cincinnati-Batavia Road (ICH 41) and Batavia-Winchester Road (ICH 125), connecting Cincinnati to Batavia, Williamsburg, Mt. Orab, Sardinia, Winchester, and beyond to an intersection with the West Union-Belfast Road (ICH 122) south of Seaman (where Graces Run Road now meets State Route 247). This entire route from Cincinnati to south of Seaman was designated and signed as State Route 74 in 1923. The route left downtown Cincinnati on Eastern Avenue, shared with State Route 7 (now U.S. Route 52) and State Route 25 (now State Route 125). SR 7 left at Davis Lane (now Airport Road), while SR 25 and SR 74 turned onto Beechmont Avenue, splitting after crossing the Little Miami River. By 1925, the east end of SR 74 had been realigned and extended, heading east from Winchester through Seaman and continuing through Peebles to State Route 73 northwest of Rarden; the old alignment (Graces Run Road) reverted to local control. Along with U.S. Route 50, US 52, and SR 125, SR 74 was moved to Columbia Parkway in the early 1940s, and in the early 1950s it was removed from downtown Cincinnati to its present terminus. Due to the existence of Interstate 74 west of Cincinnati, the number was changed to State Route 32 in 1962, with SR 74 signs being removed in June 1963 after a period of dual signage. 
The state relocated the road between Mount Carmel and Batavia as a four-lane divided highway in the early 1960s, several years after the parallel State Route 125 was widened (but not realigned). Because this was done before or during the renumbering, the old road here is known as Old State Route 74, rather than Old State Route 32 to the east. Improvement of the rest of the road did not take place until after it was added to the Appalachian Development Highway System in 1965.  This proposed Appalachian Highway—part of Corridor D—was to run across the southern part of the state from Interstate 275 outside Cincinnati to Belpre.  From the east end of SR 32 east of Peebles, the route was to continue northeast, joining State Route 772 near Elmgrove, and following State Route 124 beyond Jackson to Roads. After continuing northeast to Radcliff, it would parallel State Route 346 and a portion of State Route 143, merging with U.S. Route 50 west of Albany and following it past Athens and Coolville to Belpre. A never-built branch, planned as part of Corridor B,  would have followed State Route 73 and State Route 348 from east of Peebles to Lucasville on U.S. Route 23 ( Corridor C). 
In 1998, the Ohio Department of Transportation (ODOT) inspected a section of State Route 32 in Jackson County due to repeated pavement failure and pothole subsidence featured in the median.  Abandoned underground mines were visible near the roadway, but there were no mine maps available for the area.  An electrical resistivity tomography was conducted to see if there were mine voids underneath the roadway.  Several pits at 9.8 ft (3.0 m) deep were excavated revealing that mine voids were detected.  In response to the tests, ODOT closed the highway 1.5 mi (2.4 km) east of Wellston and began excavating the roadway to remediate the mine subsidence in November 1998.  Work to repair the roadway was completed in March 1999. 
The portion of Route 32 in Clermont, Brown, Highland, Adams, and Pike counties is under consideration as the eastward continuation of Interstate 74 from Cincinnati to Piketon, where it would connect with Interstate 73. This would necessitate replacing at-grade crossings (many of which currently have traffic signals) with either limited access interchanges or totally eliminating access.
A construction project that is apart of the Eastern Corridor, is redesigning Route 32 from Interstate 275 to Batavia. This segment of construction began in 2012.  The plan is remove all signalized intersections east of Interstate 275 and eventually replace it with a limited-access highway to Batavia.  While funding for certain segments has been identified, other segments remain unfunded. 
|Hamilton||Cincinnati ( Linwood)||0.00–|
US 50 ( Columbia Parkway) / US 50 Truck (Eastern Avenue) / SR 561 north (Linwood Avenue) – Downtown Cincinnati
|interchange; west end of SR 125 overlap|
|0.4||0.64||Wilmer Avenue / Wooster Road - Lunken Airport||interchange|
|SR 125 east (Beechmont Avenue)||interchange; east end of SR 125 overlap|
|I-275 to I-71 / US 52 – Columbus, Kentucky||I-275 exit 63|
|Eastgate Boulevard (CR 341)||interchange|
|Glen Este-Withamsville Road||Interchange|
|Elick Lane/Bach-Buxton Road||Interchange|
|Olive Branch–Stonelick Road (CR 99)||interchange|
|Main Street (CR 171) - Batavia||interchange; eastbound exit and westbound entrance|
|SR 132 / SR 222 – Batavia, Owensville||interchange|
|Batavia Road (CR 368) / James Sauls Sr. Drive||interchange|
|Half Acre Road (CR 59)||interchange|
|SR 133 – Williamsburg||interchange|
|US 68 – Mt. Orab, Fayetteville||interchange|
||No major junctions|
|Brown||Sardinia||35.651||57.375||SR 134 north / Purdy Road (CR 76) – Lynchburg, Sardinia||Southern terminus of SR 134|
|Eagle Township||41.221||66.339||US 62 – Hillsboro, Russellville, Ripley, Southern State Community College|
|Adams||Winchester||45.85||73.79||SR 136 (Main Street) – Winchester, Cherry Fork, Manchester|
|Seaman||50.419||81.142||SR 247 (Main Street) – Seaman, West Union, Adams County Salamon Airport|
|Meigs Township||58.841||94.695||SR 41 – Peebles, West Union|
|Franklin Township||64.126||103.201||SR 73 – Hillsboro, Rarden|
|Pike||Sunfish Township||76.95||123.84||SR 772 south – Rarden||Western terminus of SR 772 concurrency|
|Newton Township||79.01||127.15||SR 124 west / SR 772 north / Tennyson Road – Latham, Pike Lake State Park||Eastern terminus of SR 772 concurrency; Western terminus of SR 124 concurrency|
|Jasper||82.71||133.11||SR 104 – Waverly, Portsmouth|
|US 23 – Chillicothe, Portsmouth||interchange|
|87.56||140.91||SR 220 west / Schuster Road 81 – Waverly||Eastern terminus of SR 220|
|Marion Township||94.86||152.66||SR 335 – Beaver, Stockdale|
|Jackson||Scioto Township||102.870||165.553||SR 776 – Jackson|
|Franklin Township||105.830||170.317||SR 139 – Jackson, Minford|
|SR 93 – Jackson, Oak Hill||interchange|
|US 35 – Gallipolis, Chillicothe||interchange|
|17||SR 327 / SR 124 east – Wellston||interchange; east end of SR 124 overlap|
|Vinton||Vinton Township||125.070||201.281||SR 160 – Hamden, Wilkesville|
|Meigs||Columbia Township||130.990||210.808||SR 689 south / County Road 55 – Wilkesville||Northern terminus of SR 689|
|Athens||Lee Township||133.760||215.266||SR 143 – Middleport|
|134.780||216.907||US 50 west – McArthur, Chillicothe||Western terminus of US 50 concurrency|
|SR 681 – Albany||interchange|
|18||US 33 east / Richland Avenue – Pomeroy, Ravenswood||interchange; west end of US 33 overlap|
|17||SR 682 north to SR 56 – Athens||interchange|
|Athens Township||16C||County Road 25 / Stimson Avenue||interchange|
|16B||US 33 west / State Street – Columbus||interchange; east end of US 33 overlap|
|East State Street (CR 40)||interchange|
|151.93||244.51||SR 690 north – Strouds Run State Park||Southern terminus of SR 690|
|Rome Township||156.64||252.09||SR 329 north – Stewart, Guysville||Southern terminus of SR 329|
|SR 7 south – Pomeroy, Gallipolis||interchange; west end of SR 7 overlap|
|167.52||269.60||SR 144 – Stewart, Hockingport|
|170.52||274.43||SR 124 west / CR 61 – Hockingport||Eastern terminus of SR 124|
|Washington||Belpre Township||Clifton Road / Newbury Road||former SR 124 west|
|174.368||280.618||SR 555 north – Bartlett||Southern terminus of SR 555|
|SR 618 – Belpre||interchange; eastbound exit and westbound entrance|
|SR 339 – Beverly||interchange|
|US 50 east – Parkersburg||interchange; east end of US 50 overlap|
|SR 7 north / Toll Bridge – Marietta, Parkersburg||interchange; east end of SR 7 overlap; west end of SR 618 overlap|
SR 618 west / US 50 Bus. west (Washington Boulevard)
|Eastern terminus of SR 618 concurrency|
|WV 618 east to WV 68 / I‑77 – Parkersburg||West Virginia state line ( Parkersburg–Belpre Bridge over Ohio River)|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- Ohio maps:
- Map of Ohio Showing Inter-County Highways ( MrSID) (Map). 1 im:10 mi. Cartography by OSHD. Ohio State Highway Department. 1912. (first one to show the Inter-County Highways)
- Highway Map of Ohio Showing Progress of Improvements on the Inter-County Highway System (MrSID) (Map). 1 im:12 mi. Cartography by OSHD. Ohio State Highway Department. 1917. (lists the Inter-County Highways by name)
- Map of Ohio Showing State Routes (MrSID) (Map). 1 in:6 mi. Cartography by ODHPW. Ohio Department of Highways and Public Works. August 1, 1926. Cincinnati and Vicinity inset. (shows the routing in Cincinnati)
- Official Ohio Highway Map (MrSID) (Map). 1 mi:10 mi. Cartography by Division of Operations, Bureau of Traffic. Ohio Department of Highways. 1962. (describes the renumbering)
- Official Ohio Highway Map and Economic Digest (MrSID) (Map). 1 mi:10 mi. Cartography by Division of Operations, Bureau of Traffic. Ohio Department of Highways. 1969. (shows the proposed Appalachian Highway)
- "Technical Services DESTAPE (By County)". Ohio Department of Transportation. Archived from the original on March 22, 2012. Retrieved April 3, 2012.
- "Title 55, Chapter 5533, Section 26: James A. Rhodes Appalachian Highway". Ohio Revised Code.
- Ford, Henry A.; Ford, A. M. & Ford, Kate B. (1881). History of Hamilton County Ohio. p. 347.
- Cist, Charles. Cincinnati in 1841: Its Early Annals and Future Prospects. p. 81.
- Staff. "3101.1". History of Roadways in Ohio (PDF). Right of Way Plan Manual. Ohio Department of Transportation. p. 1. Retrieved 2015-11-11.
- Dunlap, Brett (June 30, 2007). "Bridge Remains Last Major Hurdle for Corridor D". Parkersburg News and Sentinel.
- "175 Miles of Appalachian Road Okayed". Hillsboro Press Gazette. August 3, 1965.
- "Ohio Appalachian Highway Progressing; 38.5 Miles Built". Hillsboro Press Gazette. August 8, 1969.
- Sheets, Rodney A. (2002). "Use of Electrical Resistivity to Detect Underground Mine Voids in Ohio" (PDF). USGS. p. 4. Retrieved October 9, 2017.
- "Mine Subsidence in Ohio, Diary of an Abandoned Underground Mine Subsidence Remediation: Jackson County State Route 32". Ohio Department of Transportation. November 1998. Retrieved October 9, 2017.
- "Mine Subsidence in Ohio, Diary of an Abandoned Underground Mine Subsidence Remediation: Jackson County State Route 32". Ohio Department of Transportation. March 1999. Retrieved October 9, 2017.
- "Project Status". Eastern Corridor. Retrieved September 22, 2018.
- "Eastgate Area to Batavia (Segments IV and IVa) Overview". Eastern Corridor. Retrieved September 22, 2018.
- "SR 32 Corridor Improvements" (PDF). Clermont County Transportation Improvement District. June 2018. Retrieved September 22, 2018.