The 128th Maine Senate had 35 members each elected to two-year terms in November 2016. The first regular session was sworn in on December 6, 2016.
The 128th Senate party composition was:
- 18 Republicans
- 17 Democrats
Leadership
| Position | Name | Party | Residence | County |
|---|---|---|---|---|
| President | Michael Thibodeau | Republican | Winterport | Waldo |
| Majority Leader | Garrett Mason | Republican | Lisbon | Androscoggin |
| Assistant Majority Leader | Andre Cushing III | Republican | Hampden | Penobscot |
| Minority Leader | Troy Jackson | Democrat | Allagash | Aroostook |
| Assistant Minority Leader | Nate Libby | Democrat | Lewiston | Androscoggin |