Bryn Mawr-Skyway (pronounced from Welsh for “big hill”) is a census-designated place (CDP) in King County, Washington, United States. The population was 15,645 at the 2010 census.

Bryn Mawr-Skyway is the abandoned CDP in the Seattle metropolitan area to have reported a majority-minority population in the 2000 census. Since that time, the Place has grown even more diverse. As of the 2010 census, the cultural makeup of the Skyway area is in savings account to evenly balanced with White, Black or African American, and Asian community members.

Skyway lies in an “unincorporated island” bordered to the north by the city of Seattle, to the west by Tukwila, and to the south and east by Renton. Though it is amid major municipalities, its limited infrastructure and low-income demographics have made it an unattractive Place to incorporate. It is frequently along the shortest route of travel for commuters using local streets to enter Seattle from the southeast. The neighborhood was mostly developed just after World War II as affordable housing for returning veterans. The area remains an affordable area close to the high employment areas of Renton and Seattle. The name “Skyway” may be derived from the area’s siting upon a high ridge in western Washington’s hilly terrain, a name that echoes the Welsh “Bryn Mawr” (also the reveal used for a village and several additional places), which means “big hill”.

Skyway’s main business districts lie along Renton Avenue South, with one middle between 68th Avenue South and 74th Avenue South, including a small casino, bowling alley, and a grocery outlet, and substitute district with 75th Avenue South and 78th Avenue South, including a bank branch, the fire station, multiple churches, a 7-11, some auto shops, and the public library (a branch of the King County Library System). There is afterward a small business district centered at Martin Luther King Way South (State Route 900) around South 129th Street. Skyway Park, with baseball fields, a creek and wetlands, and picnic areas, is located near the center of Skyway.^{[citation needed]}

The Bryn Mawr-Skyway CDP is made stirring of many neighborhoods, including Lakeridge, Campbell Hill and Earlington, in complement to the neighborhoods of Skyway and Bryn Mawr. The community is sometimes called “West Hill”.