The Maine Green Party held its state convention May 17-18 in Yarmouth. The Maine Green Party has the right to send 44 delegates to the national convention, a larger delegation than any other state Green Party except for the California Green Party. Presidential candidates Jesse Johnson and Kat Swift attended the convention. Cynthia McKinney did not attend, but her campaign was represented by Bruce Gagnon of the Maine Green Party.

The Maine Green Party had held caucuses in February, and Cynthia McKinney had won the most support at those caucuses. However, the delegates chosen by the May state convention will be free to vote for whom they wish in Chicago in July. The delegate slate is still being assembled.