A petition for incorporation, signed by 79 qualified voters, was presented to the Board of County Commissioners of Clallam County on August 4, 1913. On October 20, 1913, the vote on incorporation was 90 for and 66 against. And thus, on October 31, 1913, Sequim became an incorporated town.

In the native language of the S'Klallam tribe, "S'Kwim" means quiet waters. The City of Sequim (Elevation 183 feet) and the surrounding Sequim-Dungeness Valley is located on the Strait of Juan de Fuca on the north coast of Washington State. Sequim and the Dungeness valley is the gateway to the Olympic Peninsula and its numerous tourist attractions. Sequim is approximately two hours from Seattle, Tacoma, or Olympia. The population of Sequim is 4,928 (2004), and about 23,000 of the County's approximately 65,000 residents live in the valley.

Sequim is known as the "banana belt" because of its unique location in the rainshadow of the Olympic Mountains. The average annual rainfall in Sequim is only 16 inches, yet 40 miles away, the Hoh Rain Forest boasts an annual rainfall of more than 150 inches, among the highest recorded within the United States. On June 21, 1995, the City leaders passed Ordinance 95-009, prohibiting "weather that may disrupt the plans of its residents and visitors." The quality of life in the Sequim-Dungeness valley is something sought by others, and embraced by its residents. For more information about Sequim and adjoining communities, please refer to the Chamber of Commerce and SMAC (Sequim Marketing Action Committee) web sites.