- State Route 272 (SR 272) is a 19.22-mile (30.93 km) long state highway serving Whitman County in the U.S. state of Washington. The highway travels from U.S. Route 195 (US 195) in Colfax to a short concurrency with parent route SR 27 in Palouse before ending at the Idaho state line and becoming Idaho State Highway 6 (SH-6). Prior to 1964, the highway was split between Secondary State Highway 3F (SSH 3F) from Colfax to Palouse and a branch of Primary State Highway 3 (PSH 3) from Palouse to the Idaho state line.