| Theodore J. Aleixo Jr. | |
| Office: | Mayor of Taunton, Massachusetts |
| Term Start: | 1974 |
| Term End: | 1976 |
| Predecessor: | Rudolph H. DeSilva |
| Successor: | Benjamin A. Friedman |
| State Senate2: | Massachusetts |
| District2: | Bristol and Plymouth |
| Term Start2: | 1989 |
| Term End2: | 1991 |
| Successor2: | Erving H. Wall Jr. |
| State House3: | Massachusetts |
| District3: | 3rd Bristol |
| Term Start3: | 1969 |
| Term End3: | 1989 |
| Successor3: | Marc R. Pacheco |
| Party: | Democratic |
| Birth Date: | 23 August 1942 |
| Birth Place: | Taunton, Massachusetts |
| Education: | Boston University (A.B.) Suffolk University (J.D.) |
Theodore J. Aleixo Jr. (born August 23, 1942) is an American lawyer and politician from Massachusetts. He served in both houses of the Massachusetts General Court and as the Mayor of Taunton, Massachusetts.
Aleixo was elected to the Massachusetts House of Representatives in 1968 and served for 20 years. During his time in the House, he simultaneously served as Mayor of Taunton from 1974 to 1976. In 1988, he was elected to one term in the Massachusetts Senate.
Aleixo Tiger Stadium at Taunton High School and the Aleixo Skating Arena in Taunton are named in his honor.