Question 1: Citizen Initiative|
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| Choice | Votes | % |  
| Yes | 370,770 | 52.60% |  
| No | 334,049 | 47.40% |  
| Valid votes | 704,819 | 97.65% |  
| Invalid or blank votes | 16,972 | 2.35% |  
| Total votes | 721,791 | 100.00% |  |
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| Congressional district results
 
| Yes   60–70%    50–60%  | No   60–70%    50–60%    |  | 
| Source: , Tabulation of Votes | 
Maine Question 1 was a voter referendum on an initiated state statute that occurred on November 6, 2012. The referendum was held to determine whether or not to legalize same-sex marriage. The referendum passed with a 53-47% vote legalizing same-sex marriage in Maine.
The law took effect on December 29, 2012.