| William G. Greene Jr. | |
| Birth Date: | 24 April 1940 |
| Birth Place: | Stoneham, Massachusetts |
| Nationality: | American |
| Occupation: | Small business owner Politician |
| Residence: | Billerica, Massachusetts |
| Party: | Democrat |
| Spouse: | Julie Greene |
| Children: | William G. Greene and Kristin Greene; grandchildren: Andrew Greene, Christian Greene, Liam Greene, Quinn Reynolds, and Ella Reynolds |
| Alma Mater: | Northeastern University |
| Member of the Massachusetts House of Representatives from the 22nd Middlesex district | |
| Term Start: | 2003 |
| Term End: | 2011 |
| Predecessor: | Brian Cresta |
| Successor: | Marc Lombardo |
| Title2: | Member of the Massachusetts House of Representatives from the 24th Middlesex district |
| Term Start2: | 1993 |
| Term End2: | 2003 |
| Predecessor2: | Brion Cangiamila |
| Successor2: | Marc Lombardo |
William G. Greene Jr. (born April 24, 1940, in Stoneham, Massachusetts) is an American politician, was as a member of the Massachusetts House of Representatives from 1993 to 2011, a Billerica, Massachusetts town meeting member from 1970 to 1992, and Billerica Town Moderator from 1985 to 1992.[1]