Ferndale is a city in Whatcom County, Washington, United States. The population was 11,415 at the 2010 census. It is the third largest city in Whatcom County and located near the Lummi Nation.
First settled in 1872, Ferndale was given its name because of the ferns that once grew around the original school house. Ferndale was originally called Jam because the town was located next to a log jam on the Nooksack River, but the original schoolteacher decided it needed a more picturesque name. Ferndale was officially incorporated on March 19, 1907.
According to the United States Census Bureau, the city has a total area of 6.69 square miles (17.33 km2), of which, 6.61 square miles (17.12 km2) is land and 0.08 square miles (0.21 km2) is water. Downtown Ferndale is located near the river, along with Griffintown and a largely industrial area east of the Nooksack River. Northwest of these areas are suburban developments. Ferndale borders Hovander Homestead Park and Tennant Lake along its southeast boundary.