State Route 547 (SR 547) is a Washington state highway located in Whatcom County, south of the Canadian border. The 10.79-mile (17.36 km) long route runs northwest from SR 542 in Kendall to SR 9 in Sumas. The highway was originally created in 1984, but a road extending from Kendall to Sumas has been on maps since 1966 along the Sumas–Glacier route of the Chicago, Milwaukee, St. Paul and Pacific Railroad.