Route 1A, largely signed as Scenic 1A, is a 33.3-mile (53.6 km) long numbered state highway located in Washington County, Rhode Island, United States. The route, which parallels U.S. Route 1 for its entire length, has four distinct sections connected by US 1, two of which require median u-turn ramps to cross US 1. It travels through five towns in Washington County: Westerly, Charlestown, South Kingstown, Narragansett, and North Kingstown.

Washington County, known locally as South County, is a county located in the U.S. state of Rhode Island. As of the 2020 census, the population was 129,839. Rhode Island counties have no governmental functions other than as court administrative boundaries, which are part of the state government.