| Question 1: Requires a voter to present photo identification to vote and curtails access to absentee voting | November 4, 2025 | Failed | 36% |
| Question 2: Allows residents to obtain an extreme risk protection order | November 4, 2025 | Passed | 63% |
| Question 1: Limit the amount of campaign contributions to $5,000 from individuals and entities to political action committees that make independent expenditures | November 5, 2024 | Passed | 75% |
| Question 2: Authorize $25 million in general obligation bonds to the Maine Technology Institute for research, development, and commercialization of Maine-based public and private institutions in support of technological innovation | November 5, 2024 | Passed | 54% |
| Question 3: Authorize $10 million in general obligation bonds for the restoration of local community buildings | November 5, 2024 | Passed | 51% |
| Question 4: Authorize $30 million in general obligation bonds for the development and maintenance of outdoor trails | November 5, 2024 | Passed | 55% |
| Question 5: Replace the existing state flag with a flag consisting of a pine tree and the North Star on a buff (light tan) background, often called the Pine Tree Flag | November 5, 2024 | Failed | 44% |
| Question 1: Require voter approval for certain state entities, municipal electric districts, electrification cooperatives, or consumer-owned transmission utilities to incur a total outstanding debt that exceeds $1 billion | November 7, 2023 | Passed | 65% |
| Question 2: Prohibit Foreign Spending in Elections Initiative | November 7, 2023 | Passed | 86% |
| Question 3: Pine Tree Power Company Initiative | November 7, 2023 | Failed | 30% |
| Question 4: Right to Repair Law" Vehicle Data Access Requirement Initiative | November 7, 2023 | Passed | 84% |
| Question 5: Change Time Period of Judicial Review of Initiative Petitions Amendment | November 7, 2023 | Passed | 58% |
| Question 6: Require Indian Treaty Obligations and Other Constitutional Provisions Included in Official Printing Amendment | November 7, 2023 | Passed | 73% |
| Question 7: Remove Residency Requirement for Initiative Petition Circulators Amendment | November 7, 2023 | Failed | 31% |
| Question 8: Repeal Constitutional Provision Prohibiting Voting for Individuals Under Guardianship Due to Mental Illness Amendment | November 7, 2023 | Failed | 47% |
| Question 1: Prohibit the construction of electric transmission lines defined as high-impact in the Upper Kennebec Region, including the NECEC, and require a two-thirds vote of each state legislative chamber to approve high-impact electric transmission line projects | November 2, 2021 | Passed | 59% |
| Question 2: Transportation Infrastructure Bond Issue | November 2, 2021 | Passed | 72% |
| Question 3: Create a state right to growing, raising, harvesting, and producing food, as long as an individual does not commit trespassing, theft, poaching, or abuses to private land, public land, or natural resources | November 2, 2021 | Passed | 61% |
| Question 1: High-Speed Internet Infrastructure Bond Issue | July 14, 2020 | Passed | 75% |
| Question 2: Transportation Infrastructure Bond Issue | July 14, 2020 | Passed | 79% |
| Question 1: Religious and Philosophical Vaccination Exemptions Referendum | March 3, 2020 | Failed | 27% |
| Question 1: Transportation Infrastructure Bond Issue | November 5, 2019 | Passed | 76% |
| Question 2: Allow for Alternative Initiative Signatures for Persons with Disabilities Amendment | November 5, 2019 | Passed | 76% |
| Question 1: Payroll and Non-Wage Income Taxes for Home Care Program Initiative | November 6, 2018 | Failed | 37% |
| Question 2: Wastewater Infrastructure Bond Issue | November 6, 2018 | Passed | 55% |
| Question 3: Transportation Bond Issue | November 6, 2018 | Passed | 68% |
| Question 4: University of Maine System Bond Issue | November 6, 2018 | Passed | 54% |
| Question 5: Community Colleges Bond Issue | November 6, 2018 | Passed | 65% |
| Question 1: Ranked-Choice Voting Delayed Enactment and Automatic Repeal Referendum | June 12, 2018 | Passed | 54% |
| Question 1: Casino or Slot Machines in York County Initiative | November 7, 2017 | Failed | 17% |
| Question 2: Medicaid Expansion Initiative | November 7, 2017 | Passed | 59% |
| Question 3: Transportation Bond Issue | November 7, 2017 | Passed | 72% |
| Question 4: Public Pension Unfunded Liabilities from Experience Losses Amendment | November 7, 2017 | Passed | 63% |
| Question 1: Technology Sectors Funds and Business Loans Bond Issue | June 13, 2017 | Passed | 62% |
| Question 1: Marijuana Legalization | November 8, 2016 | Passed | 50% |
| Question 2: Tax on Incomes Exceeding $200,000 for Public Education | November 8, 2016 | Passed | 51% |
| Question 3: Background Checks for Gun Sales | November 8, 2016 | Failed | 48% |
| Question 4: Minimum Wage Increase | November 8, 2016 | Passed | 56% |
| Question 5: Ranked-Choice Voting Initiative | November 8, 2016 | Passed | 52% |
| Question 6: Transportation Bond | November 8, 2016 | Passed | 61% |
| Question 1: Changes to Clean Election Act and Campaign Finance Measure | November 3, 2015 | Passed | 55% |
| Question 2: Affordable Housing for Low-Income Seniors Bond | November 3, 2015 | Passed | 69% |
| Question 3: Transportation Bond | November 3, 2015 | Passed | 73% |
| Question 1: Bear Hunting Ban Initiative | November 4, 2014 | Failed | 47% |
| Question 2: Agriculture, Natural Resources and Human Health Bond Issue | November 4, 2014 | Passed | 60% |
| Question 3: Small Business Bond Issue | November 4, 2014 | Passed | 62% |
| Question 4: Cancer and Aging Research Center Bond Issue | November 4, 2014 | Passed | 63% |
| Question 5: Tissue Repair and Regeneration Laboratory Bond Issue | November 4, 2014 | Passed | 51% |
| Question 6: Clean Water and Wetlands Bond Issue | November 4, 2014 | Passed | 65% |
| Question 7: Marine Businesses Bond Issue | November 4, 2014 | Passed | 59% |
| Question 1: Army National Guard Readiness Center Bond | November 5, 2013 | Passed | 58% |
| Question 2: University System Bond | November 5, 2013 | Passed | 61% |
| Question 3: Transportation Reconstruction and Rehabilitation Bond | November 5, 2013 | Passed | 73% |
| Question 4: Maritime Academy Science Center Bond | November 5, 2013 | Passed | 53% |
| Question 5: Community College System Building Upgrade Bond | November 5, 2013 | Passed | 66% |
| Question 1: Same-Sex Marriage Question | November 6, 2012 | Passed | 52% |
| Question 2: Community College Bond Question | November 6, 2012 | Failed | 46% |
| Question 3: Water Access and Wildlife Question | November 6, 2012 | Passed | 58% |
| Question 4: Transportation Bond Question | November 6, 2012 | Passed | 69% |
| Question 5: Water and Sewer Bond Question | November 6, 2012 | Passed | 60% |