Algonquin, IL Demographics

A map of Algonquin's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	21,867	22,327	72.7%	75.2%
Hispanic	4,682	3,359	15.6%	11.3%
Asian	1,581	2,143	5.3%	7.2%
Multiracial	1,039	1,048	3.5%	3.5%
Black	832	704	2.8%	2.4%
Native American/Other	66	119	0.2%	0.4%

Algonquin, Illinois has an estimated population of 30,067, a slight increase from the 29,700 recorded in the 2020 Census. The population is 72.7% White, 15.6% Hispanic, 5.3% Asian, 3.5% Multiracial, 2.8% Black, and 0.2% Native American/Other. This demographic dot map shows the population of Algonquin, with one dot drawn for each person counted by the Census, color-coded by race.

Algonquin has become more 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 Algonquin, that probability was 41.5% in 2020 and 44.2% in the most recent ACS estimates.

Algonquin is ranked the 65th 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). Algonquin was ranked the 67th most populous place in the 2020 Census.

Algonquin's White Population

21,867 residents of Algonquin, or 72.7% of the population, identify as White. The share of White residents in Algonquin is considerably higher than in Illinois overall, where 58.1% of the population is White. Algonquin ranks 1186th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Algonquin's White population has declined by an estimated 2.1%. White residents' share of Algonquin's population has decreased from 75.2% to 72.7%.

Algonquin is more White than neighboring Lake in the Hills (66.9% White), and Carpentersville (30% White). Algonquin is less White than neighboring West Dundee (77.8% White), Trout Valley (90.2% White), and Sleepy Hollow (80.1% White).

Algonquin's Black Population

832 residents of Algonquin, or 2.8% of the population, identify as Black. The share of Black residents in Algonquin is considerably lower than in Illinois overall, where 13.3% of the population is Black. Algonquin ranks 334th statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Algonquin's Black population has grown by an estimated 18.2%. Black residents' share of Algonquin's population has remained roughly unchanged at 2.8%.

Algonquin is more Black than neighboring Lake in the Hills (1.8% Black), and Trout Valley (1.7% Black). Algonquin is less Black than neighboring Carpentersville (4.9% Black), and West Dundee (3% Black).

Algonquin's Asian Population

1,581 residents of Algonquin, or 5.3% of the population, identify as Asian. The share of Asian residents in Algonquin is comparable to the share in Illinois overall, where 5.9% of the population is Asian. Algonquin ranks 81st statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Algonquin's Asian population has declined by an estimated 26.2%. Asian residents' share of Algonquin's population has decreased from 7.2% to 5.3%.

Algonquin is more Asian than neighboring Carpentersville (4.1% Asian), Trout Valley (0.3% Asian), and Sleepy Hollow (1.5% Asian). Algonquin is less Asian than neighboring Lake in the Hills (7.2% Asian), and West Dundee (5.8% Asian).

Algonquin's Hispanic Population

4,682 residents of Algonquin, or 15.6% of the population, identify as Hispanic. The share of Hispanic residents in Algonquin is slightly lower than in Illinois overall, where 18.8% of the population is Hispanic. Algonquin ranks 230th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Algonquin's Hispanic population has grown by an estimated 39.4%. Hispanic residents' share of Algonquin's population has increased from 11.3% to 15.6%.

Algonquin is more Hispanic than neighboring West Dundee (11.3% Hispanic), Trout Valley (4.5% Hispanic), and Sleepy Hollow (12.8% Hispanic). Algonquin is less Hispanic than neighboring Lake in the Hills (20.3% Hispanic), and Carpentersville (57.4% Hispanic).

Algonquin's Native American/Other Population

66 residents of Algonquin, or 0.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Algonquin is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Algonquin ranks 710th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Algonquin's Native American/Other population has declined by an estimated 44.5%. Native American/Other residents' share of Algonquin's population has remained roughly unchanged at 0.2%.

Algonquin is more Native American/Other than neighboring Carpentersville (0.1% Native American/Other), Trout Valley (0% Native American/Other), and Sleepy Hollow (0% Native American/Other). Algonquin is less Native American/Other than neighboring Lake in the Hills (0.3% Native American/Other).

Algonquin's Multiracial Population

1,039 residents of Algonquin, or 3.5% of the population, identify as Multiracial. The share of Multiracial residents in Algonquin is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Algonquin ranks 711th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Algonquin's Multiracial population has remained roughly the same. Multiracial residents' share of Algonquin's population has remained roughly unchanged at 3.5%.

Algonquin is more Multiracial than neighboring West Dundee (1.9% Multiracial), Trout Valley (3.1% Multiracial), and Sleepy Hollow (2.8% Multiracial). Algonquin is less Multiracial than neighboring Lake in the Hills (3.6% Multiracial), and Carpentersville (3.6% 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.