| District ID | 1st District |
| Representative | Chellie Pingree |
| Party Affiliation | Democrat |
| Partisan Voting Index (PVI) | D+8 |
| 04989 |
| 04988 |
| 04927 |
| 04910 |
| 04901 |
| 04864 |
| 04863 |
| 04862 |
| 04861 |
| 04860 |
| 04859 |
| 04858 |
| 04856 |
| 04855 |
| 04854 |
| 04853 |
| 04852 |
| 04851 |
| 04847 |
| 04843 |
| 04841 |
| 04645 |
| 04579 |
| 04578 |
| 04576 |
| 04575 |
| 04574 |
| 04573 |
| 04572 |
| 04571 |
| 04570 |
| 04568 |
| 04564 |
| 04563 |
| 04562 |
| 04558 |
| 04556 |
| 04555 |
| 04554 |
| 04553 |
| 04551 |
| 04549 |
| 04548 |
| 04547 |
| 04544 |
| 04543 |
| 04541 |
| 04539 |
| 04538 |
| 04537 |
| 04535 |
| 04530 |
| 04363 |
| 04358 |
| 04357 |
| 04353 |
| 04350 |
| 04348 |
| 04345 |
| 04342 |
| 04341 |
| 04287 |
| 04260 |
| 04110 |
| 04109 |
| 04108 |
| 04107 |
| 04106 |
| 04105 |
| 04103 |
| 04102 |
| 04101 |
| 04097 |
| 04096 |
| 04095 |
| 04093 |
| 04092 |
| 04091 |
| 04090 |
| 04087 |
| 04086 |
| 04085 |
| 04084 |
| 04083 |
| 04079 |
| 04076 |
| 04074 |
| 04073 |
| 04072 |
| 04071 |
| 04069 |
| 04066 |
| 04064 |
| 04062 |
| 04061 |
| 04056 |
| 04055 |
| 04050 |
| 04049 |
| 04048 |
| 04047 |
| 04046 |
| 04043 |
| 04042 |
| 04040 |
| 04039 |
| 04038 |
| 04032 |
| 04030 |
| 04029 |
| 04027 |
| 04024 |
| 04022 |
| 04021 |
| 04020 |
| 04019 |
| 04017 |
| 04015 |
| 04013 |
| 04011 |
| 04009 |
| 04008 |
| 04006 |
| 04005 |
| 04003 |
| 04002 |
| 04001 |
| 03911 |
| 03909 |
| 03908 |
| 03907 |
| 03906 |
| 03905 |
| 03904 |
| 03903 |
| 03902 |
| 03901 |