Marengo County Demographics

A map of Marengo County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
Black	9,576	10,133	50.8%	52.4%
White	8,349	8,375	44.3%	43.3%
Hispanic	506	368	2.7%	1.9%
Multiracial	353	345	1.9%	1.8%
Asian	49	54	0.3%	0.3%
Native American/Other	18	48	0.1%	0.2%

Marengo County, Alabama has an estimated population of 18,851, a slight decrease from the 19,323 recorded in the 2020 Census. The population is 50.8% Black, 44.3% White, 2.7% Hispanic, 1.9% Multiracial, 0.3% Asian, and 0.1% Native American/Other. This demographic dot map shows the population of Marengo County, with one dot drawn for each person counted by the Census, color-coded by race.

Marengo has become slightly more racially diverse since the 2020 Census. It is more diverse than Alabama overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Marengo County, that probability was 53.6% in 2020 and 54.5% in the most recent ACS estimates.

Marengo County is ranked the 47th most populous county in Alabama, out of 67 counties. Marengo County was ranked the 48th most populous county in the 2020 Census.

Marengo County's White Population

8,349 residents of Marengo County, or 44.3% of the population, identify as White. The share of White residents in Marengo County is significantly lower than in Alabama overall, where 63.4% of the population is White. Marengo County ranks 57th statewide in terms of White residents as a share of the population, out of 67 counties.

Since the 2020 Census, Marengo County's White population has remained roughly the same. White residents' share of Marengo County's population has increased from 43.3% to 44.3%.

Marengo County is more White than neighboring Sumter County (25.7% White), Hale County (38.1% White), and Wilcox County (27.5% White). Marengo County is less White than neighboring Choctaw County (56.6% White), and Clarke County (51.1% White).

Marengo County's Black Population

9,576 residents of Marengo County, or 50.8% of the population, identify as Black. The share of Black residents in Marengo County is significantly higher than in Alabama overall, where 25.6% of the population is Black. Marengo County ranks 11th statewide in terms of Black residents as a share of the population, out of 67 counties.

Since the 2020 Census, Marengo County's Black population has declined by an estimated 5.5%. Black residents' share of Marengo County's population has decreased from 52.4% to 50.8%.

Marengo County is more Black than neighboring Choctaw County (37.5% Black), and Clarke County (44.6% Black). Marengo County is less Black than neighboring Sumter County (68.1% Black), Hale County (54.6% Black), and Wilcox County (70% Black).

Marengo County's Asian Population

49 residents of Marengo County, or 0.3% of the population, identify as Asian. The share of Asian residents in Marengo County is comparable to the share in Alabama overall, where 1.4% of the population is Asian. Marengo County ranks 50th statewide in terms of Asian residents as a share of the population, out of 67 counties.

Since the 2020 Census, Marengo County's Asian population has declined by an estimated 9.3%. Asian residents' share of Marengo County's population has remained roughly unchanged at 0.3%.

Marengo County is more Asian than neighboring Choctaw County (0% Asian), Sumter County (0.2% Asian), Hale County (0.1% Asian), and Wilcox County (0% Asian). Marengo County is less Asian than neighboring Clarke County (0.5% Asian).

Marengo County's Hispanic Population

506 residents of Marengo County, or 2.7% of the population, identify as Hispanic. The share of Hispanic residents in Marengo County is slightly lower than in Alabama overall, where 5.6% of the population is Hispanic. Marengo County ranks 49th statewide in terms of Hispanic residents as a share of the population, out of 67 counties.

Since the 2020 Census, Marengo County's Hispanic population has grown by an estimated 37.5%. Hispanic residents' share of Marengo County's population has increased from 1.9% to 2.7%.

Marengo County is more Hispanic than neighboring Choctaw County (1.2% Hispanic), Sumter County (0.7% Hispanic), Hale County (1.3% Hispanic), Wilcox County (0% Hispanic), and Clarke County (1.2% Hispanic).

Marengo County's Native American/Other Population

18 residents of Marengo County, or 0.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Marengo County is comparable to the share in Alabama overall, where 0.7% of the population is Native American/Other. Marengo County ranks 63rd statewide in terms of Native American/Other residents as a share of the population, out of 67 counties.

Since the 2020 Census, Marengo County's Native American/Other population has declined by an estimated 62.5%. Native American/Other residents' share of Marengo County's population has remained roughly unchanged at 0.1%.

Marengo County is more Native American/Other than neighboring Wilcox County (0% Native American/Other). Marengo County is less Native American/Other than neighboring Choctaw County (0.2% Native American/Other), Hale County (0.4% Native American/Other), and Clarke County (0.8% Native American/Other).

Marengo County's Multiracial Population

353 residents of Marengo County, or 1.9% of the population, identify as Multiracial. The share of Multiracial residents in Marengo County is comparable to the share in Alabama overall, where 3.3% of the population is Multiracial. Marengo County ranks 62nd statewide in terms of Multiracial residents as a share of the population, out of 67 counties.

Since the 2020 Census, Marengo County's Multiracial population has grown by an estimated 2.3%. Multiracial residents' share of Marengo County's population has remained roughly unchanged at 1.9%.

Marengo County is more Multiracial than neighboring Clarke County (1.8% Multiracial). Marengo County is less Multiracial than neighboring Choctaw County (4.5% Multiracial), Sumter County (5.2% Multiracial), Hale County (5.5% Multiracial), and Wilcox County (2.4% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.