| Karen Keiser | |
| Office: | President pro tempore of the Washington Senate |
| Term Start: | November 21, 2017 |
| Predecessor: | Tim Sheldon |
| State Senate1: | Washington |
| District1: | 33rd |
| Term Start1: | December 10, 2001 |
| Predecessor1: | Julia Patterson |
| State House2: | Washington |
| District2: | 33rd |
| Term Start2: | January 8, 1996 |
| Term End2: | December 12, 2001 |
| Predecessor2: | Greg Fisher |
| Successor2: | Dave Upthegrove |
| Birth Name: | Karen Lynne Keiser |
| Birth Date: | 29 September 1947 |
| Birth Place: | Sioux City, Iowa, U.S. |
| Party: | Democratic |
| Signature: | Karen Keiser Signature.jpg |
Karen Lynne Keiser (born September 29, 1947)[1] is an American journalist and politician of the Democratic Party. She represents the 33rd Legislative District in the Washington State Senate, which contains parts of Burien, Normandy Park, SeaTac, Kent and Des Moines.
Senator Keiser has served in the Washington state senate since 2001 and served in the Washington House of Representatives from 1996 to 2001.