Ohio State Route 166 is a short route in western Ashtabula County and northeastern Geauga County, in northeastern Ohio. The highway begins just east of Chardon at US Route 6. From there, Ohio Route 166 runs northeasterly, and then easterly to end at Ohio Route 534. This eastern end is near the unincorporated community of Trumbull.
My photo of Ohio State Route 166 signage comes from the 4-way intersection it shares with Ohio Route 86. This is at the unincorporated place known as Bostwick. Those moving northwesterly on Ohio Route 86 will see the guide marker in the photo, telling them that they've reached the turn onto Ohio Route 166. This photo was taken in October 2022, during the tour of northeastern Ohio. Back to Ohio Routes 100-199. Back to the Ohio main page. Back to the home page.