Marietta, IL Demographics

A map of Marietta's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	132	95	100.0%	94.1%
Black	0	0	0.0%	0.0%
Asian	0	0	0.0%	0.0%
Hispanic	0	0	0.0%	0.0%
Native American/Other	0	1	0.0%	1.0%
Multiracial	0	5	0.0%	5.0%

Marietta, Illinois has an estimated population of 132, a dramatic increase from the 101 recorded in the 2020 Census. The population is 100.0% White, 0.0% Black, 0.0% Asian, 0.0% Hispanic, 0.0% Native American/Other, and 0.0% Multiracial. This demographic dot map shows the population of Marietta, with one dot drawn for each person counted by the Census, color-coded by race.

Marietta has become considerably less racially diverse since the 2020 Census. It is considerably less diverse than Illinois overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Marietta, that probability was 11.3% in 2020 and 0.0% in the most recent ACS estimates.

Marietta is ranked the 1292nd most populous place in Illinois, out of 1,461 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Marietta was ranked the 1352nd most populous place in the 2020 Census.

Marietta's White Population

132 residents of Marietta, or 100.0% of the population, identify as White. The share of White residents in Marietta is significantly higher than in Illinois overall, where 58.1% of the population is White. Marietta ranks 309th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marietta's White population has grown by an estimated 38.9%. White residents' share of Marietta's population has increased from 94.1% to 100.0%.

Marietta is more White than neighboring Smithfield (99.3% White), Bushnell (94.5% White), Adair (85.1% White), Table Grove (96.4% White), and Prairie City (87.8% White).

Marietta's Black Population

0 residents of Marietta, or 0.0% of the population, identify as Black. The share of Black residents in Marietta is considerably lower than in Illinois overall, where 13.3% of the population is Black. Marietta ranks 1104th statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marietta's Black population has grown from 0 to an estimated 0. Black residents' share of Marietta's population has remained roughly unchanged at 0.0%.

Marietta is less Black than neighboring Bushnell (0.2% Black), Adair (7.9% Black), Table Grove (0.3% Black), and Prairie City (1.9% Black).

Marietta's Asian Population

0 residents of Marietta, or 0.0% of the population, identify as Asian. The share of Asian residents in Marietta is lower than in Illinois overall, where 5.9% of the population is Asian. Marietta ranks 1029th statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marietta's Asian population has grown from 0 to an estimated 0. Asian residents' share of Marietta's population has remained roughly unchanged at 0.0%.

Marietta is less Asian than neighboring Bushnell (0.4% Asian), Adair (7% Asian), and Table Grove (0.7% Asian).

Marietta's Hispanic Population

0 residents of Marietta, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in Marietta is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Marietta ranks 1387th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marietta's Hispanic population has grown from 0 to an estimated 0. Hispanic residents' share of Marietta's population has remained roughly unchanged at 0.0%.

Marietta is less Hispanic than neighboring Bushnell (1.3% Hispanic), and Prairie City (5% Hispanic).

Marietta's Native American/Other Population

0 residents of Marietta, or 0.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Marietta is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Marietta ranks 133rd statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marietta's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Marietta's population has decreased from 1.0% to 0.0%.

Marietta is less Native American/Other than neighboring Smithfield (0.7% Native American/Other), Bushnell (1.8% Native American/Other), and Prairie City (1.6% Native American/Other).

Marietta's Multiracial Population

0 residents of Marietta, or 0.0% of the population, identify as Multiracial. The share of Multiracial residents in Marietta is slightly lower than in Illinois overall, where 3.4% of the population is Multiracial. Marietta ranks 274th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marietta's Multiracial population has declined by an estimated 100.0%. Multiracial residents' share of Marietta's population has decreased from 5.0% to 0.0%.

Marietta is less Multiracial than neighboring Bushnell (1.9% Multiracial), Table Grove (2.6% Multiracial), and Prairie City (3.7% 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.