| Deborah Senn | |
| Office: | 7th Insurance Commissioner of Washington |
| Governor: | Mike Lowry Gary Locke |
| Predecessor: | Richard G. "Dick" Marquardt |
| Successor: | Mike Kreidler |
| Birth Name: | Deborah Mandel Senn |
| Birth Date: | 8 March 1949 |
| Birth Place: | Chicago, Illinois, U.S. |
| Death Place: | Seattle, Washington, U.S. |
| Party: | Democratic |
| Spouse: | Rudi Bertschi |
| Residence: | Leschi, Seattle, Washington |
| Alma Mater: | University of Illinois at Urbana–Champaign (BA) University of Illinois at Urbana–Champaign (MA) Loyola University Chicago School of Law (JD) |
Deborah Mandel Senn (March 8, 1949 – February 18, 2022) was an American lawyer and politician of the Democratic Party. She was the 7th Washington Insurance Commissioner for two terms from 1993 to 2001. In 2000, in lieu of running for re-election, she ran for the U.S. Senate, losing in the Democratic primary election to Maria Cantwell.[1] In 2004, she unsuccessfully ran for Attorney General, narrowly defeating Mark Sidran by less than 10,000 votes in the primary, but losing to Rob McKenna in the general election.[1] Senn also has been partner in a law firm.[2] She is a first cousin, once-removed of current Washington State Representative Tana Senn.[3]
Deborah Senn was raised in Chicago's South Shore neighborhood.[4] Senn served as chief counsel in Illinois Governor James R. Thompson's Office of Consumer Services.[4]