Quincy, IL Demographics

A map of Quincy's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	33,631	33,761	86.0%	85.6%
Multiracial	2,327	1,874	6.0%	4.7%
Black	1,644	2,280	4.2%	5.8%
Hispanic	969	919	2.5%	2.3%
Asian	404	390	1.0%	1.0%
Native American/Other	134	239	0.3%	0.6%

Quincy, Illinois has an estimated population of 39,109, a less than 1% change from the 39,463 recorded in the 2020 Census. The population is 86.0% White, 6.0% Multiracial, 4.2% Black, 2.5% Hispanic, 1.0% Asian, and 0.3% Native American/Other. This demographic dot map shows the population of Quincy, with one dot drawn for each person counted by the Census, color-coded by race.

Quincy has become slightly 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 Quincy, that probability was 26.2% in 2020 and 25.4% in the most recent ACS estimates.

Quincy is ranked the 44th 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). Quincy was ranked the 45th most populous place in the 2020 Census.

Quincy's White Population

33,631 residents of Quincy, or 86.0% of the population, identify as White. The share of White residents in Quincy is significantly higher than in Illinois overall, where 58.1% of the population is White. Quincy ranks 996th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Quincy's White population has remained roughly the same. White residents' share of Quincy's population has remained roughly unchanged at 86.0%.

Quincy is more White than neighboring Bloomfield (0% White), Fowler (78.1% White), and La Grange (85.4% White). Quincy is less White than neighboring Burton (100% White), and Ursa (91.9% White).

Quincy's Black Population

1,644 residents of Quincy, or 4.2% of the population, identify as Black. The share of Black residents in Quincy is lower than in Illinois overall, where 13.3% of the population is Black. Quincy ranks 203rd statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Quincy's Black population has declined by an estimated 27.9%. Black residents' share of Quincy's population has decreased from 5.8% to 4.2%.

Quincy is more Black than neighboring Bloomfield (0% Black), Burton (0% Black), Ursa (0.4% Black), and Fowler (0% Black). Quincy is less Black than neighboring La Grange (11.8% Black).

Quincy's Asian Population

404 residents of Quincy, or 1.0% of the population, identify as Asian. The share of Asian residents in Quincy is slightly lower than in Illinois overall, where 5.9% of the population is Asian. Quincy ranks 384th statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Quincy's Asian population has grown by an estimated 3.6%. Asian residents' share of Quincy's population has remained roughly unchanged at 1.0%.

Quincy is more Asian than neighboring Bloomfield (0% Asian), Burton (0% Asian), Ursa (0% Asian), Fowler (0% Asian), and La Grange (0.8% Asian).

Quincy's Hispanic Population

969 residents of Quincy, or 2.5% of the population, identify as Hispanic. The share of Hispanic residents in Quincy is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Quincy ranks 877th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Quincy's Hispanic population has grown by an estimated 5.4%. Hispanic residents' share of Quincy's population has remained roughly unchanged at 2.5%.

Quincy is more Hispanic than neighboring Bloomfield (0% Hispanic), Burton (0% Hispanic), Ursa (0% Hispanic), Fowler (0% Hispanic), and La Grange (0.5% Hispanic).

Quincy's Native American/Other Population

134 residents of Quincy, or 0.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Quincy is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Quincy ranks 368th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Quincy's Native American/Other population has declined by an estimated 43.9%. Native American/Other residents' share of Quincy's population has remained roughly unchanged at 0.3%.

Quincy is more Native American/Other than neighboring Bloomfield (0% Native American/Other), Burton (0% Native American/Other), and Fowler (0% Native American/Other). Quincy is less Native American/Other than neighboring Ursa (1.1% Native American/Other), and La Grange (0.4% Native American/Other).

Quincy's Multiracial Population

2,327 residents of Quincy, or 6.0% of the population, identify as Multiracial. The share of Multiracial residents in Quincy is slightly higher than in Illinois overall, where 3.4% of the population is Multiracial. Quincy ranks 312th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Quincy's Multiracial population has grown by an estimated 24.2%. Multiracial residents' share of Quincy's population has increased from 4.7% to 6.0%.

Quincy is more Multiracial than neighboring Bloomfield (0% Multiracial), Burton (0% Multiracial), and La Grange (1.2% Multiracial). Quincy is less Multiracial than neighboring Ursa (6.6% Multiracial), and Fowler (21.9% 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.