(Links below lead to Quick Facts for Maine Counties: People, Business & Geography at U.S. Census Bureau.)
| Area | 7/1/2008 | 7/1/2007 | 7/1/2006 | 7/1/2005 | 7/1/2004 | 7/1/2003 | 7/1/2002 | 7/1/2001 | 7/1/2000 | Census 2000 |
| Maine | 1,316,456 | 1,315,398 | 1,313,355 | 1,311,044 | 1,307,904 | 1,302,729 | 1,293,667 | 1,284,663 | 1,277,179 | 1,274,923 |
|---|---|---|---|---|---|---|---|---|---|---|
| Androscoggin County | 106,877 | 106,701 | 106,916 | 106,584 | 106,362 | 105,746 | 104,842 | 104,138 | 103,846 | 103,793 |
| Aroostook County | 71,676 | 71,952 | 72,025 | 72,294 | 72,460 | 72,582 | 72,743 | 72,852 | 73,863 | 73,938 |
| Cumberland County | 276,047 | 274,882 | 274,101 | 273,907 | 273,170 | 271,795 | 269,670 | 267,948 | 266,028 | 265,612 |
| Franklin County | 29,857 | 29,900 | 29,889 | 29,685 | 29,685 | 29,713 | 29,815 | 29,539 | 29,480 | 29,467 |
| Hancock County | 53,137 | 53,212 | 53,199 | 53,069 | 53,085 | 52,651 | 52,045 | 51,915 | 51,863 | 51,791 |
| Kennebec County | 120,959 | 120,686 | 120,488 | 120,157 | 119,729 | 119,147 | 118,422 | 117,965 | 117,213 | 117,114 |
| Knox County | 40,686 | 40,723 | 40,805 | 40,962 | 40,837 | 40,642 | 40,432 | 39,964 | 39,684 | 39,618 |
| Lincoln County | 34,628 | 34,769 | 34,794 | 34,882 | 34,832 | 34,525 | 34,257 | 33,995 | 33,699 | 33,616 |
| Oxford County | 56,741 | 56,656 | 56,426 | 56,196 | 55,952 | 55,603 | 55,478 | 55,006 | 54,802 | 54,755 |
| Penobscot County | 148,651 | 148,527 | 147,839 | 146,902 | 146,566 | 147,061 | 146,207 | 145,572 | 144,904 | 144,919 |
| Piscataquis County | 16,961 | 17,162 | 17,178 | 17,288 | 17,238 | 17,213 | 17,137 | 17,137 | 17,244 | 17,235 |
| Sagadahoc County | 36,332 | 36,344 | 36,421 | 36,333 | 36,597 | 36,691 | 35,807 | 35,500 | 35,226 | 35,214 |
| Somerset County | 51,377 | 51,580 | 51,422 | 50,950 | 50,828 | 50,949 | 50,786 | 50,774 | 50,893 | 50,888 |
| Waldo County | 38,342 | 38,469 | 38,465 | 38,145 | 38,011 | 37,822 | 37,524 | 37,018 | 36,468 | 36,280 |
| Washington County | 32,499 | 32,704 | 32,730 | 32,841 | 33,116 | 33,156 | 33,196 | 33,430 | 33,892 | 33,941 |
| York County | 201,686 | 201,131 | 200,657 | 200,849 | 199,436 | 197,433 | 195,306 | 191,910 | 188,074 | 186,742 |
Source: Population Division, U.S. Census Bureau