Gold Bar is a city in Snohomish County, Washington, United States. It is located on the Skykomish River amongst Sultan and Index, connected by U.S. Route 2. The population was 2,075 at the 2010 census.

The area around modern-day Gold Bar was occupied by the Skykomish, a branch of the Snohomish people, prior to the coming on of American settlers. The Skykomish had a long-lasting village close Gold Bar that was named ‘xaitɬd. Gold Bar started as a prospectors camp in 1869, named by a miner who found traces of gold on a river gravel bar. After Gold Bar became a construction camp for the Great Northern Railway, anti-Chinese sentiment was inflamed by a shooting fray started by disreputable camp followers. To keep the lives of the threatened Chinese, construction engineer Eduard Bauer slipped them out of camp in hastily constructed coffins. Gold Bar was officially incorporated upon September 16, 1910. The 1940 population was 307.

Gold Bar, along with next to Sultan and Index, were filming locations for the 2016 film Captain Fantastic, which plus filmed in further Western Washington locations.

In 2012, the town faced disincorporation to avoid bankruptcy.

According to the United States Census Bureau, the city has a total area of 1.03 square miles (2.67 km²), all of it land. The city center is bordered to the south by the Skykomish River and to the north by Mays Creek.