Boulder Hill, IL Demographics

A map of Boulder Hill's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	4,397	4,393	48.9%	52.3%
Hispanic	3,938	3,251	43.8%	38.7%
Multiracial	289	306	3.2%	3.6%
Black	199	338	2.2%	4.0%
Asian	155	78	1.7%	0.9%
Native American/Other	11	28	0.1%	0.3%

Boulder Hill, Illinois has an estimated population of 8,989, an increase from the 8,394 recorded in the 2020 Census. The population is 48.9% White, 43.8% Hispanic, 3.2% Multiracial, 2.2% Black, 1.7% Asian, and 0.1% Native American/Other. This demographic dot map shows the population of Boulder Hill, with one dot drawn for each person counted by the Census, color-coded by race.

Boulder Hill has become slightly less racially diverse since the 2020 Census. It is 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 Boulder Hill, that probability was 57.3% in 2020 and 56.7% in the most recent ACS estimates.

Boulder Hill is ranked the 243rd 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). Boulder Hill was ranked the 254th most populous place in the 2020 Census.

Boulder Hill's White Population

4,397 residents of Boulder Hill, or 48.9% of the population, identify as White. The share of White residents in Boulder Hill is lower than in Illinois overall, where 58.1% of the population is White. Boulder Hill ranks 1344th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Boulder Hill's White population has remained roughly the same. White residents' share of Boulder Hill's population has decreased from 52.3% to 48.9%.

Boulder Hill is more White than neighboring Aurora (32.2% White). Boulder Hill is less White than neighboring Oswego (62.4% White), Montgomery (53.8% White), North Aurora (66.8% White), and Prestbury (86% White).

Boulder Hill's Black Population

199 residents of Boulder Hill, or 2.2% of the population, identify as Black. The share of Black residents in Boulder Hill is considerably lower than in Illinois overall, where 13.3% of the population is Black. Boulder Hill ranks 246th statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Boulder Hill's Black population has declined by an estimated 41.1%. Black residents' share of Boulder Hill's population has decreased from 4.0% to 2.2%.

Boulder Hill is more Black than neighboring Prestbury (2% Black). Boulder Hill is less Black than neighboring Oswego (10.1% Black), Montgomery (7.9% Black), Aurora (10.7% Black), and North Aurora (8.3% Black).

Boulder Hill's Asian Population

155 residents of Boulder Hill, or 1.7% of the population, identify as Asian. The share of Asian residents in Boulder Hill is slightly lower than in Illinois overall, where 5.9% of the population is Asian. Boulder Hill ranks 406th statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Boulder Hill's Asian population has grown by an estimated 98.7%. Asian residents' share of Boulder Hill's population has increased from 0.9% to 1.7%.

Boulder Hill is more Asian than neighboring Prestbury (0% Asian). Boulder Hill is less Asian than neighboring Oswego (4.4% Asian), Montgomery (2.1% Asian), Aurora (12.2% Asian), and North Aurora (1.9% Asian).

Boulder Hill's Hispanic Population

3,938 residents of Boulder Hill, or 43.8% of the population, identify as Hispanic. The share of Hispanic residents in Boulder Hill is significantly higher than in Illinois overall, where 18.8% of the population is Hispanic. Boulder Hill ranks 41st statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Boulder Hill's Hispanic population has grown by an estimated 21.1%. Hispanic residents' share of Boulder Hill's population has increased from 38.7% to 43.8%.

Boulder Hill is more Hispanic than neighboring Oswego (17.9% Hispanic), Montgomery (32.1% Hispanic), Aurora (41.6% Hispanic), North Aurora (20.5% Hispanic), and Prestbury (7.7% Hispanic).

Boulder Hill's Native American/Other Population

11 residents of Boulder Hill, 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 Boulder Hill is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Boulder Hill ranks 826th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Boulder Hill's Native American/Other population has declined by an estimated 60.7%. Native American/Other residents' share of Boulder Hill's population has remained roughly unchanged at 0.1%.

Boulder Hill is more Native American/Other than neighboring Prestbury (0% Native American/Other). Boulder Hill is less Native American/Other than neighboring Oswego (0.2% Native American/Other), Montgomery (0.5% Native American/Other), Aurora (0.6% Native American/Other), and North Aurora (0.2% Native American/Other).

Boulder Hill's Multiracial Population

289 residents of Boulder Hill, or 3.2% of the population, identify as Multiracial. The share of Multiracial residents in Boulder Hill is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Boulder Hill ranks 655th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Boulder Hill's Multiracial population has declined by an estimated 5.6%. Multiracial residents' share of Boulder Hill's population has remained roughly unchanged at 3.2%.

Boulder Hill is more Multiracial than neighboring Aurora (2.7% Multiracial), and North Aurora (2.2% Multiracial). Boulder Hill is less Multiracial than neighboring Oswego (4.9% Multiracial), Montgomery (3.6% Multiracial), and Prestbury (4.3% 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.