| William Beck Sr. | |
| State House: | Montana |
| State: | Montana |
| District: | 6th |
| Term Start: | January 3, 2007 |
| Term End: | January 7, 2013 |
| Predecessor: | Verdell Jackson |
| Successor: | Carl Glimm |
| Party: | Republican |
| Birth Date: | 6 December 1934 |
| Birth Place: | Philadelphia, Pennsylvania, U.S. |
| Residence: | Whitefish, Montana |
William James Beck Sr. (born December 6, 1934) is an American former politician who was a Republican member of the Montana Legislature. He was elected to House District 6 which includes the Whitefish area. He served in that capacity from 2007 to 2013.[1] [2]