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
Marengo County is a county in Alabama with a population of 19,027. It ranks #47 among counties in Alabama by population. The median age is 41.1, older than the national median. The population is 47.4% male and 52.6% female.
The median household income in Marengo County is $44,205, below the US median of $74,580. 14.1% of residents live below the federal poverty level. Home values sit at a median of $103,400, with monthly rent averaging $722. The homeownership rate of 69.0% is higher than the national rate of 64.8%.
Educational attainment in Marengo County reflects 20.4% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 4.1% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 27.1 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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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.