State Route 28 (SR 28) is a 135.32-mile (217.78 km) long state highway serving Douglas, Grant, and Lincoln counties in the U.S. state of Washington. The highway begins at an intersection with U.S. Route 2 (US 2) and U.S. Route 97 (US 97) in East Wenatchee and travels east through Quincy, Ephrata, and Odessa before ending at US 2 in Davenport.