The 11th Congressional District was composed of Cambridge, wards 1,2,3, and 22 of Boston, and wards 1,2, and 3 of Somerville. JFK's address at the time of the election was 122 Bowdoin Street, Boston.
The results of the democratic primary held on June 18, 1946 were:
| John F. Cotter (Boston) |
6,677 |
| Michael Delucca (Boston) |
536 |
| Robert DiFruscio (Boston) |
298 |
| Catherine Falvey (Somerville) |
2,446 |
| John F. Kennedy (Boston) |
22,183 |
| Joseph Lee (Boston) |
1,843 |
| Michael Neville (Cambridge) |
11,341 |
| Francis X. Rooney (Somerville) |
521 |
| Joseph Russo (Boston) |
5,661 |
| Joseph Russo (Boston) |
799 |
| Blank Ballots |
2,444 |
The results of the general election of November 5, 1946 were:
| Lester W. Bown (R-Somerville) |
26,007 |
| Philip Geer (Prohib-Boston) |
1,036 |
| John F. Kennedy (D-Boston) |
69,093 |
| Blank Ballots |
9,237 |