| Ken Decaria | |
| Office: | Minority Leader of the Wyoming Senate |
| Term Start: | 2007 |
| Term End: | 2008 |
| Predecessor: | Rae Lynn Job |
| Successor: | Kathryn Sessions |
| State Senate1: | Wyoming |
| District1: | 15th |
| Term Start1: | 1999 |
| Term End1: | 2010 |
| Office2: | Member of the Wyoming House of Representatives |
| Term Start2: | 1997 |
| Term End2: | 1998 |
| Party: | Democratic |
| Birth Date: | 5 November 1953 |
| Birth Place: | Ogden, Utah, U.S. |
| Spouse: | Peggy |
| Profession: | educator |
Ken Decaria (born November 5, 1953) is an American politician who served as a Democratic member of the Wyoming Senate, representing the 15th district from 1999 to 2009. He previously served in the Wyoming House of Representatives from 1997 through 1998.