Marengo County, Alabama Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 47th-largest in Alabama
The population of Marengo County, Alabama is 19,027 as of the 2023 American Community Survey, making it the 47th-largest county in Alabama. The median household income is $44,205, the median home value is $103,400, and the median age is 41.1.
The population of Marengo County has declined 11.7% since 2010 (20,955 → 18,512), a -0.88% annualized rate.
19,027
Population
-0.88%
Annual growth
19
People / sq mi
$44,205
Median Income
$103,400
Median Home Value
Marengo County covers 977 sq mi of land at 19.5 people per square mile.
About Marengo County, AL
Among US counties, Marengo County stands out first on household income: a median of $44,205, below the US median of $78,538. With 19,027 residents, Marengo County is a county in Alabama. It ranks #47 among counties in Alabama by population.
Household earnings sit near the bottom of the range at $44,205, below the US median of $78,538. The poverty rate is 14.1%, above the national 12.4%. Property is affordable here, the median home worth $103,400, with typical rent around $722.
Roughly 20.4% of adults have a bachelor’s, below the national 35.0%. Remote work is on the lower side here, at 4.1%, below the national 14.0%, and the average commute runs about 27 minutes each way.
Marengo County Population History (2010-2024)
The county of Marengo County had a population of 20,955 in 2010 and 18,512 in 2024, a -11.7% growth over 14 years. The peak was 20,955 in 2010. Average annual growth rate: -0.88%.
18,512
Population (2024)
20,955
Population (2010)
20,955
Peak (2010)
-0.88%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 20,955 |
| 2011 | 20,663 |
| 2012 | 20,378 |
| 2013 | 20,123 |
| 2014 | 19,990 |
| 2015 | 19,772 |
| 2016 | 19,536 |
| 2017 | 19,411 |
| 2018 | 19,093 |
| 2019 | 18,919 |
| 2020 | 19,271 |
| 2021 | 18,978 |
| 2022 | 18,790 |
| 2023 | 18,705 |
| 2024 | 18,512 |
Race & Ethnicity
| White | 45.0% |
| Black or African American | 51.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Age & Sex
41.1
Median Age
52.6%
Female
47.4%
Male
20.2%
Age 65+
Age Distribution
Children (under 15): 18.6% · Seniors (65+): 20.2%
Income & Poverty
| Median household income | $44,205$-17,822 vs state |
| Mean household income | $67,077 |
| Per-capita income | $27,957 |
| Poverty rate | 14.1%+2.8% vs state |
| Unemployment rate | 1.2% |
| Employment-to-population | 48.5% |
Top Industries by Employment
The largest employment sector in Marengo County is professional & business services, accounting for 26.6% of workers.
How residents commute
1.3%
Drive alone
0.6%
Carpool
83.0%
Public transit
4.1%
Work from home
27.1 min
Avg commute
Housing
$103,400$-91,700 vs state
Median home value
$722
Median rent
69.0%
Homeownership rate
9,837
Total housing units
77.4%
Occupied
22.6%
Vacant
31.0%
Renter-occupied
Social & access
91.4%
With health insurance
87.4%
With broadband internet
17.1%
Foreign-born
9.7%
Veterans (18+)
23.9%
With a disability
98.0%
Speak language other than English at home
Education
85.6%
High School+
20.4%
Bachelor's+
Largest cities in Alabama
Other counties in Alabama
Part of Alabama
Metro areas in Alabama
County rankings
Frequently Asked Questions
Marengo County, Alabama has a population of 19,027 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 47th-largest county in Alabama. Population density is 19 people per square mile.
The population of Marengo County has declined 11.7% since 2010 (20,955 → 18,512), a -0.88% annualized rate.
The median household income in Marengo County, Alabama is $44,205, with mean (average) household income of $67,077 and per-capita income of $27,957. 14.1% of residents live below the federal poverty level.
In Marengo County, the largest racial and ethnic groups are Black or African American (51.3%), White (45.0%), Hispanic or Latino (0.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Marengo County, Alabama is 41.1 years. Residents are 52.6% female and 47.4% male.
The median home value in Marengo County is $103,400 and median monthly rent is $722. 69.0% of occupied housing units are owner-occupied. The county has 9,837 total housing units, 22.6% of which are vacant.
The largest employment sector in Marengo County, Alabama is professional, scientific, and management services, employing 26.6% of workers. The unemployment rate is 1.2%.
Huntsville is among the largest cities associated with Marengo County, Alabama, with a population of 218,814.
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Full rankings of Alabama counties
Statewide data for Alabama
Population, race, income, age, and trends across Alabama
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.