Maine polling average: Platner (D) 72.0% · Mills (D) 13.0% · Costello (D) 4.0%Mean of the polls published in the 21 days to 8 Jun 2026.
Polling trend
Each point is one published poll; lines are the 21-day average of all polls. Hover or tap for institute and date.
What the polls say
Platner (D) leads the polling average in Maine on 72.0%, 59.0 points ahead of Mills (D) (13.0%). The biggest shift over the past month is Mills (D), down 15.3 points.
2 polls from 2 institutes were published in the last 30 days of polling. The most recent is from Tavern Research (D), published 8 Jun 2026. The average weighs every poll equally over 21 days; read how it works.