2018Final results
2018 election for Maine Senate District 21
Maine State Senate · Maine
Nathan L. Libby (D) won with 60.4% of the vote, defeating Nelson M. J. Peters Jr. (R) by 20.8 points.
Nathan L. LibbyDemocrat · winner · incumbent
60.4%8,210
Nelson M. J. Peters Jr.Republican
39.6%5,378
13,588 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET