There are 186 state legislative seats up for election in Maine in 2024. Across those, 38 incumbents (22 Democrats and 16 Republicans) did not file to run for re-election. That is less than the average number of retirements in Maine from rom 2010-2022 (55.1) and is is the fewest number of retiring incumbents since 2016, when 38 incumbents retired (24 Democrats, 10 Republicans, and four Independents). In 2022, 75 incumbents did not run for re-election (39 Democrats, 35 Republicans, and one independent).

Seven incumbents out of the 146 running will face primary challengers. That is the same number of incumbents facing challengers as in 2020 and more than all other cycles since 2010. The next closest year was 2012 when five incumbents faced primary challengers.

There are 19 total contested primaries (with more than one candidate) – nine Democratic and 10 Republican. That is less than the average number of contested primaries from 2010-2022 (30.5) and the lowest total during that span. The year with the second-fewest number of contested primaries was 2014, which had 26 (13 Democratic and 13 Republican). The year with the highest number of contested primaries during that span was 2012 with 39 (23 Democratic and 13 Republican).