Oswego, IL Demographics

A map of Oswego's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	22,713	23,400	62.4%	67.7%
Hispanic	6,507	5,416	17.9%	15.7%
Black	3,689	2,574	10.1%	7.4%
Multiracial	1,780	1,417	4.9%	4.1%
Asian	1,612	1,588	4.4%	4.6%
Native American/Other	74	190	0.2%	0.5%

Oswego, Illinois has an estimated population of 36,375, an increase from the 34,585 recorded in the 2020 Census. The population is 62.4% White, 17.9% Hispanic, 10.1% Black, 4.9% Multiracial, 4.4% Asian, and 0.2% Native American/Other. This demographic dot map shows the population of Oswego, with one dot drawn for each person counted by the Census, color-coded by race.

Oswego has become considerably more 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 Oswego, that probability was 50.8% in 2020 and 56.4% in the most recent ACS estimates.

Oswego is ranked the 50th 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). Oswego was ranked the 54th most populous place in the 2020 Census.

Oswego's White Population

22,713 residents of Oswego, or 62.4% of the population, identify as White. The share of White residents in Oswego is slightly higher than in Illinois overall, where 58.1% of the population is White. Oswego ranks 1253rd statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oswego's White population has declined by an estimated 2.9%. White residents' share of Oswego's population has decreased from 67.7% to 62.4%.

Oswego is more White than neighboring Boulder Hill (48.9% White), Montgomery (53.8% White), and Aurora (32.2% White). Oswego is less White than neighboring Yorkville (68.6% White), and North Aurora (66.8% White).

Oswego's Black Population

3,689 residents of Oswego, or 10.1% of the population, identify as Black. The share of Black residents in Oswego is slightly lower than in Illinois overall, where 13.3% of the population is Black. Oswego ranks 170th statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oswego's Black population has grown by an estimated 43.3%. Black residents' share of Oswego's population has increased from 7.4% to 10.1%.

Oswego is more Black than neighboring Boulder Hill (2.2% Black), Montgomery (7.9% Black), Yorkville (6.7% Black), and North Aurora (8.3% Black). Oswego is less Black than neighboring Aurora (10.7% Black).

Oswego's Asian Population

1,612 residents of Oswego, or 4.4% of the population, identify as Asian. The share of Asian residents in Oswego is comparable to the share in Illinois overall, where 5.9% of the population is Asian. Oswego ranks 131st statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oswego's Asian population has grown by an estimated 1.5%. Asian residents' share of Oswego's population has remained roughly unchanged at 4.4%.

Oswego is more Asian than neighboring Boulder Hill (1.7% Asian), Montgomery (2.1% Asian), Yorkville (3.1% Asian), and North Aurora (1.9% Asian). Oswego is less Asian than neighboring Aurora (12.2% Asian).

Oswego's Hispanic Population

6,507 residents of Oswego, or 17.9% of the population, identify as Hispanic. The share of Hispanic residents in Oswego is comparable to the share in Illinois overall, where 18.8% of the population is Hispanic. Oswego ranks 162nd statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oswego's Hispanic population has grown by an estimated 20.1%. Hispanic residents' share of Oswego's population has increased from 15.7% to 17.9%.

Oswego is less Hispanic than neighboring Boulder Hill (43.8% Hispanic), Montgomery (32.1% Hispanic), Aurora (41.6% Hispanic), Yorkville (19.4% Hispanic), and North Aurora (20.5% Hispanic).

Oswego's Native American/Other Population

74 residents of Oswego, 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 Oswego is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Oswego ranks 445th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oswego's Native American/Other population has declined by an estimated 61.1%. Native American/Other residents' share of Oswego's population has remained roughly unchanged at 0.2%.

Oswego is more Native American/Other than neighboring Boulder Hill (0.1% Native American/Other). Oswego is less Native American/Other than neighboring Montgomery (0.5% Native American/Other), Aurora (0.6% Native American/Other), and Yorkville (0.3% Native American/Other).

Oswego's Multiracial Population

1,780 residents of Oswego, or 4.9% of the population, identify as Multiracial. The share of Multiracial residents in Oswego is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Oswego ranks 495th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Oswego's Multiracial population has grown by an estimated 25.6%. Multiracial residents' share of Oswego's population has increased from 4.1% to 4.9%.

Oswego is more Multiracial than neighboring Boulder Hill (3.2% Multiracial), Montgomery (3.6% Multiracial), Aurora (2.7% Multiracial), Yorkville (2% Multiracial), and North Aurora (2.2% 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.