Swansea, IL Demographics

A map of Swansea's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	10,319	9,286	70.1%	64.5%
Black	2,827	3,268	19.2%	22.7%
Multiracial	1,085	731	7.4%	5.1%
Asian	348	389	2.4%	2.7%
Hispanic	131	589	0.9%	4.1%
Native American/Other	0	123	0.0%	0.9%

Swansea, Illinois has an estimated population of 14,710, a slight increase from the 14,386 recorded in the 2020 Census. The population is 70.1% White, 19.2% Black, 7.4% Multiracial, 2.4% Asian, 0.9% Hispanic, and 0.0% Native American/Other. This demographic dot map shows the population of Swansea, with one dot drawn for each person counted by the Census, color-coded by race.

Swansea 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 Swansea, that probability was 52.7% in 2020 and 46.5% in the most recent ACS estimates.

Swansea is ranked the 168th 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). Swansea was ranked the 169th most populous place in the 2020 Census.

Swansea's White Population

10,319 residents of Swansea, or 70.1% of the population, identify as White. The share of White residents in Swansea is considerably higher than in Illinois overall, where 58.1% of the population is White. Swansea ranks 1277th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Swansea's White population has grown by an estimated 11.1%. White residents' share of Swansea's population has increased from 64.5% to 70.1%.

Swansea is more White than neighboring Belleville (56.7% White), Fairview Heights (51% White), Shiloh (60.9% White), O'Fallon (69.4% White), and Caseyville (62.5% White).

Swansea's Black Population

2,827 residents of Swansea, or 19.2% of the population, identify as Black. The share of Black residents in Swansea is higher than in Illinois overall, where 13.3% of the population is Black. Swansea ranks 79th statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Swansea's Black population has declined by an estimated 13.5%. Black residents' share of Swansea's population has decreased from 22.7% to 19.2%.

Swansea is more Black than neighboring O'Fallon (16.5% Black), and Caseyville (10.6% Black). Swansea is less Black than neighboring Belleville (32.5% Black), Fairview Heights (27.6% Black), and Shiloh (24.4% Black).

Swansea's Asian Population

348 residents of Swansea, or 2.4% of the population, identify as Asian. The share of Asian residents in Swansea is slightly lower than in Illinois overall, where 5.9% of the population is Asian. Swansea ranks 192nd statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Swansea's Asian population has declined by an estimated 10.5%. Asian residents' share of Swansea's population has remained roughly unchanged at 2.4%.

Swansea is more Asian than neighboring Belleville (1% Asian), and Caseyville (0% Asian). Swansea is less Asian than neighboring Fairview Heights (4% Asian), Shiloh (3.3% Asian), and O'Fallon (2.6% Asian).

Swansea's Hispanic Population

131 residents of Swansea, or 0.9% of the population, identify as Hispanic. The share of Hispanic residents in Swansea is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Swansea ranks 597th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Swansea's Hispanic population has declined by an estimated 77.8%. Hispanic residents' share of Swansea's population has decreased from 4.1% to 0.9%.

Swansea is less Hispanic than neighboring Belleville (2.9% Hispanic), Fairview Heights (6.9% Hispanic), Shiloh (4.9% Hispanic), O'Fallon (5.1% Hispanic), and Caseyville (21.5% Hispanic).

Swansea's Native American/Other Population

0 residents of Swansea, 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 Swansea is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Swansea ranks 184th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Swansea's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Swansea's population has decreased from 0.9% to 0.0%.

Swansea is less Native American/Other than neighboring Belleville (0.5% Native American/Other), Fairview Heights (0.9% Native American/Other), Shiloh (0.7% Native American/Other), and O'Fallon (0.5% Native American/Other).

Swansea's Multiracial Population

1,085 residents of Swansea, or 7.4% of the population, identify as Multiracial. The share of Multiracial residents in Swansea is slightly higher than in Illinois overall, where 3.4% of the population is Multiracial. Swansea ranks 246th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Swansea's Multiracial population has grown by an estimated 48.4%. Multiracial residents' share of Swansea's population has increased from 5.1% to 7.4%.

Swansea is more Multiracial than neighboring Belleville (6.3% Multiracial), Shiloh (5.9% Multiracial), O'Fallon (5.8% Multiracial), and Caseyville (5.3% Multiracial). Swansea is less Multiracial than neighboring Fairview Heights (9.5% 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.