Lucille Elsa Roybal-Allard (born June 12, 1941) is an American politician who served as a U.S. representative from California from 1993 to 2023. A member of the Democratic Party, she first entered Congress in 1993. Her district, numbered as the 33rd until 2003, the 34th from 2003 to 2013, and the 40th from 2013 to 2023, included much of southern Los Angeles, as well as several eastern suburbs, such as Downey, Bell and Bell Gardens. On December 20, 2021, Roybal-Allard announced her retirement at the end of the 117th Congress.

Roybal-Allard was born in Boyle Heights, California, the daughter of Edward R. Roybal, who served in Congress from 1963 to 1993, and Lucille Beserra Roybal. She attended Ramona Convent Secondary School in Alhambra, California, graduating in 1959. She also attended California State University, Los Angeles.

Roybal-Allard was a public relations officer and fund-raising executive. She was also a member of the California State Assembly from 1987 to 1992, first elected on May 12, 1987, in a special election to replace Gloria Molina, who resigned after being elected to the Los Angeles City Council.

In 1992, Roybal-Allard won the Democratic nomination for the newly created 33rd district, which included a sliver of the area her father had represented for 30 years. She won the general election handily and was re-elected 14 times with no substantial opposition in this heavily Democratic, Latino-majority district. Her district was renumbered the 34th after the 2000 census and the 40th after the 2010 census. As of the 2010 census, it is the most Latino district in the nation, with a Latino majority of 86.5%. Until 2013, she represented much of downtown Los Angeles.

Roybal-Allard was the first Latina to serve as one of the 12 "cardinals", or chairs, of a House Appropriations Subcommittee, as well as the first Latina to serve on the House Appropriations Committee. She is also the first woman to chair the Congressional Hispanic Caucus; the first woman to chair the California Democratic congressional delegation; and the founder of the Women's Working Group on Immigration Reform.

Her Sober Truth on Preventing Underage Drinking (STOP) Act has been instrumental in reducing underage drinking and its consequences. From her position on the House Appropriations Committee, she has spearheaded many federal projects that have created jobs and improved her constituents' lives, including the new federal courthouse in Downtown Los Angeles, the Metro Gold Line Lightrail Eastside Extension, the deepening of the Port of Los Angeles, and the ongoing revitalization of the Los Angeles River.

Roybal-Allard chaired the California Democratic congressional delegation in 1998–1999. She has also been active in the Congressional Children's Caucus and on the Democratic Homeland Security and the Livable Communities task forces.

Roybal-Allard was the first Democratic Mexican-American woman to serve in Congress. She and Nydia Velazquez were the third and fourth Latinas elected to Congress, after Barbara Vucanovich and Ileana Ros-Lehtinen. She and Velazquez are the first Latina Democrats to serve in that body, and the first two elected to a full term.