Born in 1931, Dolores Sibonga grew up in Seattle's International District. She received her B.A. in journalism in 1952 and a law degree in 1973, both from the University of Washington. She was the first Filipina-American admitted to the Bar Association in Washington State. Prior to attending law school, Sibonga worked in radio and television in Spokane and Seattle, including producing documentaries, and publishing a community newspaper. After receiving her law degree, Sibonga served as a public defender and later was Deputy Director of the Washington State Human Rights Commission. Sibonga was appointed in 1978 to fill Phyllis Lamphere's seat until a special election was held. She did not run in the special election, but was subsequently elected to Council for the term beginning in 1980. She chose not to stand for reelection in 1992. While on Council she chaired four committees: Personnel and Property Management (1978, 1980-1981), Parks and Community Resources (1982-1983, 1988-1989), Finance (1984-1987, 1990-1991), and Labor (1986-1987). During her tenure on the City Council, Sibonga championed minority hiring by the City, increased expenditures for parks, Japanese-American reparations, and maintaining the local character of Seattle Center during a proposed redesign of the facility by the Disney Corporation. After her Council term expired, Sibonga resumed her law practice and served on the Horse Racing Commission and Human Rights Commission.