Vader is a city in Lewis County, Washington, United States. The community began in the 1870s and was known under several different names during its early years. Vader was most recognizably known as Little Falls, after a waterfall on nearby Olequa Creek, until an official name change to Vader in 1913. The city's moniker has remained an issue, with unsuccessful votes held in the 21st century to convert back to Little Falls.