Waldo County, Maine Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 11th-largest in Maine
The population of Waldo County, Maine is 40,006 as of the 2023 American Community Survey, making it the 11th-largest county in Maine. The median household income is $68,441, the median home value is $239,100, and the median age is 46.9.
The population of Waldo County has grown 4.6% since 2010 (38,824 → 40,617), a +0.32% annualized rate.
40,006
Population
+0.32%
Annual growth
55
People / sq mi
$68,441
Median Income
$239,100
Median Home Value
Waldo County covers 730 sq mi of land at 54.8 people per square mile.
About Waldo County, ME
Waldo County is a county in Maine with a population of 40,006. It ranks #11 among counties in Maine by population. The median age is 46.9, older than the national median. The population is 49.6% male and 50.4% female.
The median household income in Waldo County is $68,441, below the US median of $74,580. 7.3% of residents live below the federal poverty level. Home values sit at a median of $239,100, with monthly rent averaging $969. The homeownership rate of 80.9% is higher than the national rate of 64.8%.
Educational attainment in Waldo County reflects 34.8% of adults 25 and older holding a bachelor's degree or higher, near the national average of 34.3%. Roughly 15.1% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 26.2 minutes each way.
Waldo County Population History (2010-2024)
The county of Waldo County had a population of 38,824 in 2010 and 40,617 in 2024, a 4.6% growth over 14 years. The peak was 40,617 in 2024. Average annual growth rate: 0.32%.
40,617
Population (2024)
38,824
Population (2010)
40,617
Peak (2024)
0.32%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 38,824 |
| 2011 | 38,865 |
| 2012 | 38,934 |
| 2013 | 39,041 |
| 2014 | 39,056 |
| 2015 | 39,143 |
| 2016 | 39,468 |
| 2017 | 39,791 |
| 2018 | 39,678 |
| 2019 | 39,755 |
| 2020 | 39,666 |
| 2021 | 39,974 |
| 2022 | 40,212 |
| 2023 | 40,490 |
| 2024 | 40,617 |
Race & Ethnicity
| White | 93.9% |
| Black or African American | 0.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.3% |
| Two or More Races | 0.0% |
Age & Sex
46.9
Median Age
50.4%
Female
49.6%
Male
24.5%
Age 65+
Age Distribution
Children (under 15): 14.7% · Seniors (65+): 24.5%
Income & Poverty
| Median household income | $68,441$-3,332 vs state |
| Mean household income | $86,416 |
| Per-capita income | $38,183 |
| Poverty rate | 7.3%+0.8% vs state |
| Unemployment rate | 2.6% |
| Employment-to-population | 55.9% |
Top Industries by Employment
The largest employment sector in Waldo County is professional & business services, accounting for 26.5% of workers.
How residents commute
0.6%
Drive alone
3.6%
Carpool
72.2%
Public transit
15.1%
Work from home
26.2 min
Avg commute
Housing
$239,100$-27,300 vs state
Median home value
$969
Median rent
80.9%
Homeownership rate
22,118
Total housing units
79.0%
Occupied
21.0%
Vacant
19.1%
Renter-occupied
Social & access
90.6%
With health insurance
93.4%
With broadband internet
37.6%
Foreign-born
7.9%
Veterans (18+)
16.3%
With a disability
95.3%
Speak language other than English at home
Education
93.7%
High School+
34.8%
Bachelor's+
Largest cities in Maine
Other counties in Maine
Part of Maine
Metro areas in Maine
County rankings
Frequently Asked Questions
Waldo County, Maine has a population of 40,006 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 11th-largest county in Maine. Population density is 55 people per square mile.
The population of Waldo County has grown 4.6% since 2010 (38,824 → 40,617), a +0.32% annualized rate.
The median household income in Waldo County, Maine is $68,441, with mean (average) household income of $86,416 and per-capita income of $38,183. 7.3% of residents live below the federal poverty level.
In Waldo County, the largest racial and ethnic groups are White (93.9%), Hispanic or Latino (1.3%), Black or African American (0.6%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Waldo County, Maine is 46.9 years. Residents are 50.4% female and 49.6% male.
The median home value in Waldo County is $239,100 and median monthly rent is $969. 80.9% of occupied housing units are owner-occupied. The county has 22,118 total housing units, 21.0% of which are vacant.
The largest employment sector in Waldo County, Maine is professional, scientific, and management services, employing 26.5% of workers. The unemployment rate is 2.6%.
Portland is among the largest cities associated with Waldo County, Maine, with a population of 68,505.
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Full rankings of Maine counties
Statewide data for Maine
Population, race, income, age, and trends across Maine
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.