Gas Works Park is a park located in Seattle, Washington, United States. It is a 19.1-acre (77,000 m2) public park on the site of the former Seattle Gas Light Company gasification plant, located on the north shore of Lake Union at the south end of the Wallingford neighborhood. The park was added to the National Register of Historic Places on January 2, 2013, over a decade after being nominated.

A gasworks or gas house is an industrial plant for the production of flammable gas. Many of these have been made redundant in the developed world by the use of natural gas, though they are still used for storage space.