| John D. Keenan | |
| Birth Date: | 4 April 1965 |
| Birth Place: | Salem, Massachusetts |
| Office1: | 14th President of Salem State University |
| Term Start1: | August 6, 2017 |
| Predecessor1: | Patricia Maguire Meservey |
| State House2: | Massachusetts |
| District2: | 7th Essex |
| Term Start2: | 2005 |
| Term End2: | August 23, 2014 |
| Predecessor2: | J. Michael Ruane |
| Successor2: | Paul Tucker |
| Party: | Democratic |
| Alma Mater: | Harvard College Suffolk University Law School |
| Nationality: | American |
| Residence: | Salem, Massachusetts |
John D. Keenan (born April 4, 1965) is an American attorney and politician who has served as the president of Salem State University since 2017. He was the Massachusetts State Representative for the 7th Essex district, which consists of his hometown of Salem, from 2005 to 2014. He is a Democrat. Prior to serving in the Massachusetts legislature, he was assistant district attorney of Essex County and city solicitor of Salem.
Representative Keenan was from 2011 to 2014 the House Chair of Joint Committee on Telecommunications, Utilities and Energy.[1] [2] [3] He resigned from the legislature August 23, 2014, and took his post at Salem State on August 25.[4]