General election
- Robert Charles Republican
- Alexander Murchison Independent
mechanical engineer
- Derek Levasseur Independent
former police officer and Republican candidate for U.S. Senate in 2020
- Ed Crockett Independent
state representative (2018–present)
- John Glowa Independent
retired environmental specialist
- Rick Bennett Independent
state senator (1996–2004, 2020–present), Republican nominee for in 1994 and candidate for U.S. Senate in 2012
- Democrat Nominee TBD
Democratic primary
energy executive and son of U.S. Senator and former governor Angus King
former director of the Maine Governor's Office of Policy Innovation, former Speaker of the Maine House of Representatives (2008–2010), and daughter of U.S. Representative Chellie Pingree
former principal deputy director of the Centers for Disease Control and Prevention (2023–2025) and former director of the Maine CDC (2019–2023)
Maine Secretary of State (2021–present) and nominee for U.S. Senate in 2014
former President of the Maine Senate (2018–2024) and candidate for Maine's 2nd congressional district in 2014
Republican convention straw poll results
former CEO of Crunch Fitness
Jonathan Bush 11.4%
Garrett Mason 9.0%
Owen McCarthy 8.8%- Robert Wessels 6.3%
- David Jones 5.3%
Bobby Charles