Ohio State Route 239 is a tiny north-south route on the west side of Portsmouth, Ohio. On the west side of the Scioto River, Ohio Route 104 heads southerly toward West Portsmouth. Ohio Route 73 soon joins from the west, and it heads south-southwesterly together with Ohio Route 104. As the two routes bend southeasterly toward Portsmouth, Ohio Route 239 is created to continue south-southwesterly. Ohio Route 239 runs for one mile, and then it ends at a 4-way intersection with US Route 52, right by the Ohio River.