State Route 823 (SR 823) is a state highway in Yakima County, Washington, United States. It runs for 5.6 miles (9.0 km) from an interchange with U.S. Route 12 (US 12) and through the city of Selah to a junction with SR 821. A portion of the highway runs in the median of Interstate 82 (I-82), its parent route, as it crosses the Naches River.