County · Alabama
Marengo County, Alabama
Marengo County, Alabama. Marengo County had 18,311 residents in 2025 by the Census Bureau's estimate, down 5.2% since 2020, while Alabama grew 3.3%. It holds 10 places (8 cities, villages and boroughs and 2 census-designated) and 8 census tracts. GEOID 01091.
Residents, July 2025 estimate
18,311
Census Bureau estimate (no margin published)
2020 Census count: 19,323 · ACS 2020-2024: 18,851
Median household income
$43,825
±$5,429 (90% margin)
Alabama: $63,999
Median home value
$107,400
±$10,723 (90% margin)
Alabama: $209,900
Median gross rent
$716
±$69 (90% margin)
Alabama: $1,007
How many people live in Marengo County, and is it growing?
The 2020 Census counted 19,323 residents in Marengo County. The Census Bureau estimates 18,311 for July 1, 2025, down 5.2% since 2020, while Alabama grew 3.3%. The 2020-2024 American Community Survey puts the population at 18,851 over 977 square miles of land.
| Measure | Marengo County | Alabama | Change since 2015-2019 |
|---|---|---|---|
| Total population | 18,851 | 5,086,768 | −470 |
| Households | 7,898±268 | 1,997,247 | +537 |
| Average household size | 2.36±0.08 | 2.48 | −0.23 |
| Housing units | 9,867±20 | 2,337,265 | −481 |
Marengo County's population since 2000
From 22,539 in 2000 to 18,311 in 2025: down 18.8%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Marengo County?
Marengo County holds 10 places: 8 cities, villages and boroughs (incorporated places) and 2 census-designated places. The largest is Demopolis with 6,641 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Demopolis | 7,162 | $34,802 |
|---|---|---|
| Linden | 1,930 | $38,667 |
| Thomaston | 326 | $58,125 |
| Sweet WaterGEOID 0174304 | 228 | $52,411 |
| PutnamGEOID 0162952 | 172 | $39,141 |
| ProvidenceGEOID 0162688 | 167 | $50,000 |
| FaunsdaleGEOID 0125816 | 90 | $99,583 |
| NanafaliaGEOID 0153208 | 75 | not published |
| MyrtlewoodGEOID 0153112 | 70 | $95,469 |
| DaytonGEOID 0119912 | 28 | not published |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Marengo County?
The median resident of Marengo County is 41.4 years old; 22.0% are under 18 and 20.6% are 65 or older. The largest group is non-Hispanic Black residents at 50.8%, then non-Hispanic white residents at 44.3%. 1.6% of residents were born outside the United States.
| Measure | Marengo County | Alabama | Change since 2015-2019 |
|---|---|---|---|
| Median age | 41.4±1.5 | 39.3 | no clear change |
| Under 18 years | 22.0%±0.2 pts | 22.2% | – |
| 65 years and over | 20.6%±0.2 pts | 17.8% | – |
| Hispanic or Latino (any race) | 2.7% | 5.6% | – |
| White alone, not Hispanic | 44.3%±0.1 pts | 63.4% | −0.6 pts |
| Black or African American alone, not Hispanic | 50.8%±0.7 pts | 25.6% | −2.8 pts |
| Asian alone, not Hispanic | 0.3%±0.2 pts | 1.4% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.1%±0.1 pts | 0.3% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.2 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.9%±0.7 pts | 3.3% | – |
| Some other race alone, not Hispanic | 0.0%±0.2 pts | 0.4% | – |
| Born outside the United States | 1.6%±0.3 pts | 4.0% | – |
| Speak a language other than English at home (age 5+) | 2.3%±0.5 pts | 6.0% | – |
| Civilian veterans (age 18+) | 9.5%±2.2 pts | 7.7% | – |
| With a disability | 21.9%±2.6 pts | 16.5% | – |
| No health insurance coverage | 9.2%±1.8 pts | 9.2% | no clear change |
| High school graduate or higher (age 25+) | 85.8%±2.9 pts | 88.6% | – |
| Bachelor's degree or higher (age 25+) | 19.5%±3.0 pts | 28.4% | no clear change |
| Graduate or professional degree (age 25+) | 8.5%±1.7 pts | 11.1% | – |
| Moved from another state in the past year | 1.5%±1.1 pts | 2.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Marengo County earn?
Half of Marengo County's 7,898 households earn less than $43,825 a year (±$5,429), against $63,999 in Alabama. In 2015-2019 it was $40,910 in 2024 dollars; the margins of error cannot tell the two periods apart. 21.9% of residents live below the poverty line.
| Measure | Marengo County | Alabama | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $43,825±$5,429 | $63,999 | no clear change |
| Mean household income | $70,748±$7,060 | $88,898 | – |
| Per capita income | $30,868±$2,993 | $36,087 | no clear change |
| People below the poverty line | 21.9%±3.4 pts | 15.6% | no clear change |
| Children under 18 below the poverty line | 25.8%±7.2 pts | 21.3% | no clear change |
| Households receiving SNAP | 23.6%±4.0 pts | 13.7% | – |
| Households with a broadband subscription | 78.0%±3.7 pts | 87.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Marengo County?
Owners occupy 70.2% of Marengo County's occupied homes and renters 29.8%. The median owner-occupied home is valued at $107,400 by its owner (±$10,723). The median renter pays $716 a month including utilities, and 46.4% of renters pay 35% or more of their income on rent.
| Measure | Marengo County | Alabama | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $107,400±$10,723 | $209,900 | no clear change |
| Median gross rent | $716±$69 | $1,007 | no clear change |
| Renters paying 35% or more of income on rent | 46.4%±9.6 pts | 39.9% | no clear change |
| Median monthly owner costs, with a mortgage | $1,286±$76 | $1,433 | – |
| Owner-occupied homes | 70.2%±3.7 pts | 70.2% | no clear change |
| Housing units | 9,867±20 | 2,337,265 | −481 |
| Homeowner vacancy rate | 0.1%±0.2 pts | 1.1% | – |
| Rental vacancy rate | 3.6%±3.1 pts | 7.2% | – |
| Single-family detached homes | 56.5%±3.0 pts | 69.1% | – |
| Mobile homes | 29.5%±3.3 pts | 12.3% | – |
| Built 2020 or later | 1.8%±1.3 pts | 2.3% | – |
| Built 1939 or earlier | 8.2%±2.1 pts | 4.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Marengo County building?
Builders took permits for 0 new housing units across Marengo County in 2025 (0 single-family), 0.0 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Marengo County get to work?
83.0% of Marengo County's workers drive alone and 4.6% work from home. The average trip to work takes 26.4 minutes. The unemployment rate in 2020-2024 averaged 4.1%.
| Measure | Marengo County | Alabama | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 50.9%±3.9 pts | 58.3% | – |
| Unemployment rate | 4.1%±2.1 pts | 4.7% | −3.9 pts |
| Drove alone to work | 83.0%±2.9 pts | 80.6% | – |
| Carpooled | 8.3%±1.8 pts | 8.0% | – |
| Public transportation | 1.0%±1.1 pts | 0.3% | – |
| Walked | 0.7%±0.6 pts | 1.1% | – |
| Worked from home | 4.6%±2.1 pts | 8.8% | no clear change |
| Mean travel time to work | 26.4 min±2.5 | 25.5 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Marengo County's census tracts?
Marengo County is divided into 8 census tracts. Among those with a reliable estimate, median household income runs from $22,417 (Tract 9730.01) to $79,209 (Tract 9734).
| Tract 9729.0101091972901 | 1,538±220 | $41,728 |
|---|---|---|
| Tract 9729.0201091972902 | 3,768±640 | $26,524 |
| Tract 9730.0101091973001 | 902±210 | $22,417 |
| Tract 9730.0201091973002 | 2,665±502 | $35,417 |
| Tract 973101091973100 | 1,552±294 | $34,321 |
| Tract 973201091973200 | 2,181±374 | $57,054 |
| Tract 973301091973300 | 1,898±384 | $55,430 |
| Tract 973401091973400 | 4,347±560 | $79,209 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Marengo County compare with Alabama's other counties?
| Measure | Rank |
|---|---|
| Population | 47th of 67 |
| Growth 2020-2025 | 57th of 67 |
| Residents per square mile | 55th of 67 |
| Median household income | 56th of 67 |
| Median home value | 56th of 67 |
| Median gross rent | 48th of 67 |
| Poverty rate | 16th of 67 |
| Bachelor's degree or higher | 26th of 67 |
| Median age | 32nd of 67 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Marengo County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.