State Route 747 (SR 747, OH 747) is a north–south state highway in the southwestern portion of the U.S. state of Ohio. It connects with State Route 4 at both ends, from a signalized intersection in Glendale at the south end to a signalized intersection approximately 2 miles (3.2 km) west of State Route 63 near Monroe at the north end, bypassing Fairfield and Hamilton in the process. State Route 747 is also known as Princeton-Glendale Road.

Along its way, State Route 747 passes through northern Hamilton County and southern Butler County. No portion of State Route 747 is included within the National Highway System, a system of routes deemed most important for the country's economy, mobility and defense.

When it made its debut in 1937, State Route 747 followed the same routing between State Route 4 in Glendale and State Route 4 near Monroe that it utilizes to this day. The highway has not experienced any major changes to its routing since it was established.