U.S. Census Bureau · 2025 Population Estimates Program (PEP)
Maine County Population — 2025 PEP
July 1, 2025 resident population estimates for 16 counties. State total (sum of these county estimates): 1,414,874 persons.
Separate 2025 TIGER/Line county boundaries validate county identity; these are not ACS 2024 survey estimates.
Official Vintage 2025 county identities and unsimplified TIGER coordinates; separate-period ACS housing is joined only by exact full GEOID. Original 2020 counts require separately evidenced compatible geography; incompatible observations remain null with reasons. The revised April estimates base is not an original census count; no boundary allocation is invented.
Source and downloads
2025 Census PEP county estimates, 2020–2025 series; counts are persons, migration counts are persons, published rates are per 1,000, and unavailable values remain null (not zero). 2020 rates are unavailable for the partial-year interval. County totals and characteristics are verified against the pinned raw Census CSV receipts and independent 2025 county geometry.
Official Census PEP county source · Download JSON · Download CSV · Download source metadata
Official state totals and county summaries
Official NST July 1, 2025 state total: 1,414,874 persons (SUMLEV 040, PEP Vintage 2025). County sum: 1,414,874 persons; comparison status: equal.
Official NST July 2020: 1,364,546 persons; July 2020–July 2025 change: +50,328 persons; growth: 3.688260 percent (denominator: official July 2020 population).
County July 2024–July 2025: Growing: 12 · Shrinking: 4 · Unchanged: 0 · Missing: 0. Median county growth: 0.279729 percent.
Largest county: Cumberland County (GEOID 23005): 317222 persons.
Fastest county growth: Cumberland County (GEOID 23005): 0.812610 percent.
Greatest numeric increase: Cumberland County (GEOID 23005): 2557 persons.
no minimum population; missing excluded per measure; median of county percentages, not population weighted; equal values use ascending full GEOID.
Official state demographics
Resident population · SUMLEV 040 · July 1, 2025 · Census PEP Vintage 2025. Denominator for every share: 1,414,874 resident persons. Six exclusive race groups; Hispanic origin overlaps race and must not be added to it. Release: June 2026; exact day unproved; PEP estimates have no ACS sampling MOE.
Scroll horizontally to see Count and Share. Keyboard: focus this table region and use Left and Right arrow keys.
| Measure | Count | Share |
|---|---|---|
| Female | 721,486 persons | 50.992951 percent |
| Male | 693,388 persons | 49.007049 percent |
| Ages 18–24 | 115,472 persons | 8.161292 percent |
| Ages 25–44 | 349,097 persons | 24.673363 percent |
| Ages 45–64 | 358,443 persons | 25.333917 percent |
| Ages 65 and older | 347,617 persons | 24.568760 percent |
| Under 18 | 244,245 persons | 17.262668 percent |
| American Indian or Alaska Native alone | 9,343 persons | 0.660341 percent |
| Asian alone | 22,709 persons | 1.605019 percent |
| Black or African American alone | 40,447 persons | 2.858700 percent |
| Native Hawaiian or other Pacific Islander alone | 693 persons | 0.048980 percent |
| Two or more races | 48,617 persons | 3.436136 percent |
| White alone | 1,293,065 persons | 91.390823 percent |
| Hispanic (any race) | 38,976 persons | 2.754733 percent |
| Not Hispanic | 1,375,898 persons | 97.245267 percent |
Official state median age: 44.9 years. Published state SYASEX median age; not a county aggregation, not ACS.
Revised April 1, 2020 estimates base (official NST): 1,363,218 persons; county base sum: 1,363,218 persons; comparison: equal. This is not the original decennial census count.
Original April 1, 2020 Census count: 14 compatible counties; 2 unavailable. Published Census county centers-of-population POPULATION, original 2020 Gazetteer and official 2020–2025 geographic-change evidence; no boundary allocation. Original count, revised April estimates base and July 2020 estimate are separate observations. Documentation: November 2021; exact file release day unproved; retrieval is not release. Official original count source. Original 2020 Gazetteer identity plus Census geographic-change notes 2014–2025; no county-level change recorded from 2020 onward, exact full modern name, and original count required. Any recorded county-level change or referenced counterparty is conservatively unavailable, including unresolved internal redistricting. Same GEOID alone is insufficient. Not a claim of identical cartographic coordinates; no invented allocations.
Source release date unavailable: retained pins do not attest an official release date; retrieval is not release. Reference dates and Vintage 2025 are explicit; no current-vintage refresh is implied.
County population and demographic explorer
Choose a measure, observation year and county without downloading boundaries. Rankings, search, trends and CSV work without a map. Load map explicitly to download the full, unsimplified 2025 TIGER boundaries; this defers rather than removes their payload. The table remains available without JavaScript.
PEP population · persons · July 1, 2025. Denominator: none. Calculation/source: CO POPESTIMATEy. Vintage 2025; null with metric_status reason; measured zero remains zero; no imputation.
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Selected county demographic breakdown
July 1, 2025 · Cumberland County (GEOID 23005). Same-period county population is the share denominator. Hispanic origin overlaps race; do not add origin to race counts. Other overlapping classifications are not additive. Official county median age is from PEP AGESEX MEDIAN_AGE_TOT, not ACS.
| Classification / source | Count or statistic | Share / status |
|---|---|---|
| Sex · PEP male | 153,737 persons | 48.463537 percent |
| Sex · PEP female | 163,485 persons | 51.536463 percent |
| Age bands · PEP under18 | 54,438 persons | 17.160853 percent |
| Age bands · PEP age18 24 | 27,213 persons | 8.578535 percent |
| Age bands · PEP age25 44 | 86,497 persons | 27.267024 percent |
| Age bands · PEP age45 64 | 77,660 persons | 24.481278 percent |
| Age bands · PEP age65plus | 71,414 persons | 22.512310 percent |
| Race alone (partition) · PEP white alone | 279,587 persons | 88.136069 percent |
| Race alone (partition) · PEP black alone | 16,995 persons | 5.357447 percent |
| Race alone (partition) · PEP aian alone | 987 persons | 0.311139 percent |
| Race alone (partition) · PEP asian alone | 8,574 persons | 2.702839 percent |
| Race alone (partition) · PEP nhpi alone | 137 persons | 0.043187 percent |
| Race alone (partition) · PEP two or more | 10,942 persons | 3.449319 percent |
| Hispanic origin (overlaps race) · PEP hispanic any race | 11,893 persons | 3.749109 percent |
| Hispanic origin (overlaps race) · PEP not hispanic | 305,329 persons | 96.250891 percent |
| Other overlapping classifications (not additive) · PEP white alone or combination | 290,313 persons | 91.517297 percent |
| Other overlapping classifications (not additive) · PEP not hispanic white alone | 269,970 persons | 85.104438 percent |
| Official county median age · AGESEX MEDIAN_AGE_TOT | 42.7 years | Not a share; not ACS or an average of county medians |
Use Ctrl/Command or Shift to select multiple counties. The following trend uses exact resident persons, not percentages; county size affects the scale. Missing observations break lines; the revised April estimates base is a separate dashed partial interval.
2025 county population rankings
All 16 county estimates are present without JavaScript, ranked by 2025 population (largest first). Signed changes compare July 1, 2024 to July 1, 2025. Unavailable is not zero; equal values break ties by GEOID (ascending).
Showing all 16 counties; ranked by 2025 population, descending.
| Rank | County | GEOID | Population (persons) | Signed change (persons) | Signed change (percent) |
|---|---|---|---|---|---|
| 1 | Cumberland County | 23005 | 317,222 | +2557 persons | +0.812610% |
| 2 | York County | 23031 | 222,434 | +1328 persons | +0.600617% |
| 3 | Penobscot County | 23019 | 157,967 | +684 persons | +0.434885% |
| 4 | Kennebec County | 23011 | 129,067 | +395 persons | +0.306982% |
| 5 | Androscoggin County | 23001 | 116,487 | +887 persons | +0.767301% |
| 6 | Aroostook County | 23003 | 66,609 | -316 persons | -0.472170% |
| 7 | Oxford County | 23017 | 60,346 | +376 persons | +0.626980% |
| 8 | Hancock County | 23009 | 57,171 | +41 persons | +0.071766% |
| 9 | Somerset County | 23025 | 51,620 | +130 persons | +0.252476% |
| 10 | Knox County | 23013 | 41,117 | +153 persons | +0.373499% |
| 11 | Waldo County | 23027 | 40,693 | +82 persons | +0.201916% |
| 12 | Sagadahoc County | 23023 | 37,979 | +285 persons | +0.756089% |
| 13 | Lincoln County | 23015 | 36,595 | +71 persons | +0.194393% |
| 14 | Washington County | 23029 | 31,334 | -132 persons | -0.419500% |
| 15 | Franklin County | 23007 | 30,824 | -51 persons | -0.165182% |
| 16 | Piscataquis County | 23021 | 17,409 | -54 persons | -0.309225% |
County population trend · 2020–2025
Resident population (persons), not ACS housing. April 1, 2020 estimates base is distinct from the July 1, 2020 estimate. The April–July 2020 change is partial-year; the July 2020–July 2021 interval is the first July-to-July comparison. No 2020 annual rate is shown. Missing observations are unavailable, never zero.
Showing Cumberland County (GEOID 23005). Select a county on the map or in the rankings table to update this trend.
Horizontal axis: year (2020–2025); vertical axis: resident population (persons). The 2020 base is a separate April 1 observation; July 1 estimates run from 2020 through 2025. Focus the chart viewport and use Left/Right arrows to scroll on narrow screens. Complete axis labels stay here outside the scrolling chart; the table gives exact values and availability.
| Date | Population (persons) | Interval |
|---|---|---|
| April 1, 2020 base | 303,076 | Estimates base; not July 1 |
| July 1, 2020 | 303,588 | April–July partial-year; no annual rate |
| July 1, 2021 | 306,150 | July 2020–July 2021 comparison |
| July 1, 2022 | 309,532 | July-to-July estimate |
| July 1, 2023 | 311,645 | July-to-July estimate |
| July 1, 2024 | 314,665 | July-to-July estimate |
| July 1, 2025 | 317,222 | July-to-July estimate |
County population and median home value · different vintages
Each point pairs a county’s PEP July 1, 2025 resident population (persons) with its ACS 2024 5-year median owner-occupied home value (B25077, U.S. dollars). These are different reference periods and different statistical programs. This descriptive comparison does not imply causality or matched vintages. Suppressed, missing or invalid ACS estimates are unavailable, not zero and not plotted. A valid zero remains zero.
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| County | GEOID | PEP July 1, 2025 population (persons) | ACS 2024 5-year median home value (U.S. dollars) |
|---|---|---|---|
| Androscoggin County | 23001 | 116,487 | $252,800 |
| Aroostook County | 23003 | 66,609 | $149,700 |
| Cumberland County | 23005 | 317,222 | $451,200 |
| Franklin County | 23007 | 30,824 | $194,700 |
| Hancock County | 23009 | 57,171 | $310,400 |
| Kennebec County | 23011 | 129,067 | $238,200 |
| Knox County | 23013 | 41,117 | $324,900 |
| Lincoln County | 23015 | 36,595 | $332,700 |
| Oxford County | 23017 | 60,346 | $217,300 |
| Penobscot County | 23019 | 157,967 | $214,100 |
| Piscataquis County | 23021 | 17,409 | $170,200 |
| Sagadahoc County | 23023 | 37,979 | $333,300 |
| Somerset County | 23025 | 51,620 | $166,900 |
| Waldo County | 23027 | 40,693 | $257,700 |
| Washington County | 23029 | 31,334 | $161,800 |
| York County | 23031 | 222,434 | $395,700 |