| Mary Margaret Haugen | |
| State Senate: | Washington |
| District: | 10th |
| Term Start: | January 11, 1993 |
| Term End: | January 14, 2013 |
| Preceded: | Jack Metcalf |
| Succeeded: | Barbara Bailey |
| State House2: | Washington |
| District2: | 10th |
| Term Start2: | January 10, 1982 |
| Term End2: | January 11, 1993 |
| Preceded2: | Joan Houchen |
| Succeeded2: | Barbara Bailey |
| Birth Name: | Mary Margaret Haugen |
| Birth Date: | 14 January 1941 |
| Birth Place: | Camano Island, Washington, U.S. |
| Party: | Democratic |
Mary Margaret Haugen (born January 14, 1941) is an American politician. She was a Washington state senator from 1993 to 2013 and served chairwoman of the Senate Transportation Committee.
From 1982 to 1992, Haugen served in the Washington House of Representatives. Before that, she served three terms as a member of the Stanwood School Board.
Haugen is married and lives on Camano Island. She is a Democrat.
In the 2012 race for her State Senate seat, Haugen lost by 5% to Republican Barbara Bailey.[1]