Dorchester, IL Demographics

A map of Dorchester's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	179	126	98.4%	94.7%
Multiracial	3	4	1.6%	3.0%
Black	0	0	0.0%	0.0%
Asian	0	0	0.0%	0.0%
Hispanic	0	2	0.0%	1.5%
Native American/Other	0	1	0.0%	0.8%

Dorchester, Illinois has an estimated population of 182, a dramatic increase from the 133 recorded in the 2020 Census. The population is 98.4% White, 1.6% Multiracial, 0.0% Black, 0.0% Asian, 0.0% Hispanic, and 0.0% Native American/Other. This demographic dot map shows the population of Dorchester, with one dot drawn for each person counted by the Census, color-coded by race.

Dorchester 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 Dorchester, that probability was 10.1% in 2020 and 3.2% in the most recent ACS estimates.

Dorchester is ranked the 1227th 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). Dorchester was ranked the 1300th most populous place in the 2020 Census.

Dorchester's White Population

179 residents of Dorchester, or 98.4% of the population, identify as White. The share of White residents in Dorchester is significantly higher than in Illinois overall, where 58.1% of the population is White. Dorchester ranks 219th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Dorchester's White population has grown by an estimated 42.1%. White residents' share of Dorchester's population has increased from 94.7% to 98.4%.

Dorchester is more White than neighboring Wilsonville (98.2% White), Mount Clare (95.2% White), Royal Lakes (24.6% White), Bunker Hill (96.7% White), and Gillespie (91.2% White).

Dorchester's Black Population

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

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

Dorchester is less Black than neighboring Mount Clare (1.7% Black), Royal Lakes (74.8% Black), and Bunker Hill (1.5% Black).

Dorchester's Asian Population

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

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

Dorchester is less Asian than neighboring Royal Lakes (0.7% Asian), and Bunker Hill (0.3% Asian).

Dorchester's Hispanic Population

0 residents of Dorchester, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in Dorchester is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Dorchester ranks 1116th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Dorchester's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of Dorchester's population has decreased from 1.5% to 0.0%.

Dorchester is less Hispanic than neighboring Wilsonville (0.4% Hispanic), Bunker Hill (0.3% Hispanic), and Gillespie (1% Hispanic).

Dorchester's Native American/Other Population

0 residents of Dorchester, 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 Dorchester is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Dorchester ranks 236th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Dorchester's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Dorchester's population has decreased from 0.8% to 0.0%.

Dorchester is less Native American/Other than neighboring Gillespie (0.2% Native American/Other).

Dorchester's Multiracial Population

3 residents of Dorchester, or 1.6% of the population, identify as Multiracial. The share of Multiracial residents in Dorchester is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Dorchester ranks 929th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Dorchester's Multiracial population has declined by an estimated 25.0%. Multiracial residents' share of Dorchester's population has decreased from 3.0% to 1.6%.

Dorchester is more Multiracial than neighboring Wilsonville (1.4% Multiracial), Royal Lakes (0% Multiracial), and Bunker Hill (1.2% Multiracial). Dorchester is less Multiracial than neighboring Mount Clare (3.1% Multiracial), and Gillespie (7.5% 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.