United States Senate election in Maine, 2026 (June 9 Democratic primary)

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U.S. Senate, Maine
Democratic primary Republican primary General election
Election details
Filing deadline: March 16, 2026
Primary: June 9, 2026 General: November 3, 2026
How to vote
Poll times: 6 a.m. to 8 p.m. Voting in Maine
Race ratings
Cook Political Report: Toss-up DDHQ and The Hill: Pending Inside Elections: Tilt Republican Sabato's Crystal Ball: Toss-up
Ballotpedia analysis
U.S. Senate battlegrounds U.S. House battlegrounds Federal and state primary competitiveness Ballotpedia's Election Analysis Hub, 2026
See also
U.S. Senate, Maine U.S. Senate • 1st • 2nd Maine elections, 2026 U.S. Congress elections, 2026 U.S. Senate elections, 2026 U.S. House elections, 2026 Alabama U.S. Senate raceAlaska U.S. Senate raceArkansas U.S. Senate raceColorado U.S. Senate raceDelaware U.S. Senate raceGeorgia U.S. Senate raceIdaho U.S. Senate raceIllinois U.S. Senate raceIowa U.S. Senate raceKansas U.S. Senate raceKentucky U.S. Senate raceLouisiana U.S. Senate raceMaine U.S. Senate raceMassachusetts U.S. Senate raceMichigan U.S. Senate raceMinnesota U.S. Senate raceMississippi U.S. Senate raceMontana U.S. Senate raceNebraska U.S. Senate raceNew Hampshire U.S. Senate raceNew Jersey U.S. Senate raceNew Mexico U.S. Senate raceNorth Carolina U.S. Senate raceOklahoma U.S. Senate raceOregon U.S. Senate raceRhode Island U.S. Senate raceSouth Carolina U.S. Senate raceSouth Dakota U.S. Senate raceTennessee U.S. Senate raceTexas U.S. Senate raceVirginia U.S. Senate raceWest Virginia U.S. Senate raceWyoming U.S. Senate raceSubmit

A Democratic Party primary takes place on June 9, 2026, in Maine to determine which Democratic candidate will run in the state's general election on November 3, 2026.

Candidate filing deadline	Primary election	General election
March 16, 2026	June 9, 2026	November 3, 2026

Heading into the election, the incumbent is Susan Collins (Republican), who was first elected in 1996.

A primary election is an election in which registered voters select a candidate that they believe should be a political party's candidate for elected office to run in the general election. They are also used to choose convention delegates and party leaders. Primaries are state-level and local-level elections that take place prior to a general election. Maine utilizes a semi-closed primary process, in which both registered party members and unaffiliated voters may participate. Unaffiliated voters may vote in one partisan primary of their choosing in each election. Affiliated voters must change enrollment at least 15 days prior to the primary to vote in a different party's primary.

For information about which offices are nominated via primary election, see this article.

This page focuses on Maine's United States Senate Democratic primary. For more in-depth information on the state's Republican primary and the general election, see the following pages:

• United States Senate election in Maine, 2026 (June 9 Republican primary)
• United States Senate election in Maine, 2026

Candidates and election results

Note: The following list includes official candidates only. Ballotpedia defines official candidates as people who:

• Register with a federal or state campaign finance agency before the candidate filing deadline
• Appear on candidate lists released by government election agencies

Note: At this time, Ballotpedia is combining all declared candidates for this election into one list under a general election heading. As primary election dates are published, this information will be updated to separate general election candidates from primary candidates as appropriate.

Candidate profiles

There are currently no candidate profiles created for this race. Candidate profiles will appear here as they are created. Encourage the candidates in this race to complete Ballotpedia's Candidate Connection survey so that their profile will appear here.

Voting information

See also: Voting in Maine

Ballotpedia will publish the dates and deadlines related to this election as they are made available.

Campaign finance

There are currently no declared candidates in this race. Know of one we missed? Click here to let us know.

Ballot access

The table below details filing requirements for U.S. Senate candidates in Maine in the 2026 election cycle. For additional information on candidate ballot access requirements in Maine, click here.

Filing requirements for U.S. Senate candidates, 2026
State	Office	Party	Signatures required	Filing fee	Filing deadline	Source
Maine	U.S. Senate	Qualified party	2,000	N/A	3/16/2026	Source
Maine	U.S. Senate	Unaffiliated	4,000	N/A	6/1/2026	Source

See also

• United States Senate election in Maine, 2026 (June 9 Republican primary)
• United States Senate election in Maine, 2026
• United States Senate Democratic Party primaries, 2026
• United States Senate Republican Party primaries, 2026
• United States Senate elections, 2026
• U.S. Senate battlegrounds, 2026

External links

Suggest a link

• Search Google News for this topic

Footnotes

[show]

Maine's current delegation to the United States Congress

Senators

Susan Collins (R)

Angus King (I)

Representatives

District 1

Chellie Pingree (D)

District 2

Jared Golden (D)

Democratic Party (2)

Republican Party (1)

Independent (1)

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