Marion, IL Demographics

A map of Marion's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	14,225	13,728	84.5%	81.4%
Black	1,345	1,258	8.0%	7.5%
Hispanic	450	622	2.7%	3.7%
Multiracial	399	878	2.4%	5.2%
Asian	398	245	2.4%	1.5%
Native American/Other	19	124	0.1%	0.7%

Marion, Illinois has an estimated population of 16,836, a less than 1% change from the 16,855 recorded in the 2020 Census. The population is 84.5% White, 8.0% Black, 2.7% Hispanic, 2.4% Asian, 2.4% Multiracial, and 0.1% Native American/Other. This demographic dot map shows the population of Marion, with one dot drawn for each person counted by the Census, color-coded by race.

Marion has become 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 Marion, that probability was 32.7% in 2020 and 27.8% in the most recent ACS estimates.

Marion is ranked the 151st 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). Marion was ranked the 153rd most populous place in the 2020 Census.

Marion's White Population

14,225 residents of Marion, or 84.5% of the population, identify as White. The share of White residents in Marion is significantly higher than in Illinois overall, where 58.1% of the population is White. Marion ranks 1084th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marion's White population has grown by an estimated 3.6%. White residents' share of Marion's population has increased from 81.4% to 84.5%.

Marion is more White than neighboring Spillertown (82.9% White), and Energy (80.5% White). Marion is less White than neighboring Whiteash (100% White), Johnston City (90.4% White), and Pittsburg (95.5% White).

Marion's Black Population

1,345 residents of Marion, or 8.0% of the population, identify as Black. The share of Black residents in Marion is lower than in Illinois overall, where 13.3% of the population is Black. Marion ranks 169th statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marion's Black population has grown by an estimated 6.9%. Black residents' share of Marion's population has increased from 7.5% to 8.0%.

Marion is more Black than neighboring Spillertown (0.8% Black), Whiteash (0% Black), Johnston City (0.8% Black), Energy (0% Black), and Pittsburg (0% Black).

Marion's Asian Population

398 residents of Marion, or 2.4% of the population, identify as Asian. The share of Asian residents in Marion is slightly lower than in Illinois overall, where 5.9% of the population is Asian. Marion ranks 295th statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marion's Asian population has grown by an estimated 62.4%. Asian residents' share of Marion's population has increased from 1.5% to 2.4%.

Marion is more Asian than neighboring Whiteash (0% Asian), Energy (0.7% Asian), and Pittsburg (0% Asian). Marion is less Asian than neighboring Spillertown (7.3% Asian), and Johnston City (2.6% Asian).

Marion's Hispanic Population

450 residents of Marion, or 2.7% of the population, identify as Hispanic. The share of Hispanic residents in Marion is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Marion ranks 640th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marion's Hispanic population has declined by an estimated 27.7%. Hispanic residents' share of Marion's population has decreased from 3.7% to 2.7%.

Marion is more Hispanic than neighboring Whiteash (0% Hispanic), Johnston City (1.7% Hispanic), Energy (2% Hispanic), and Pittsburg (1.8% Hispanic). Marion is less Hispanic than neighboring Spillertown (8.1% Hispanic).

Marion's Native American/Other Population

19 residents of Marion, 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 Marion is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Marion ranks 247th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marion's Native American/Other population has declined by an estimated 84.7%. Native American/Other residents' share of Marion's population has decreased from 0.7% to 0.1%.

Marion is more Native American/Other than neighboring Spillertown (0% Native American/Other), Whiteash (0% Native American/Other), Johnston City (0% Native American/Other), and Energy (0% Native American/Other).

Marion's Multiracial Population

399 residents of Marion, or 2.4% of the population, identify as Multiracial. The share of Multiracial residents in Marion is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Marion ranks 215th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Marion's Multiracial population has declined by an estimated 54.6%. Multiracial residents' share of Marion's population has decreased from 5.2% to 2.4%.

Marion is more Multiracial than neighboring Spillertown (0.8% Multiracial), and Whiteash (0% Multiracial). Marion is less Multiracial than neighboring Johnston City (4.5% Multiracial), Energy (16.9% Multiracial), and Pittsburg (2.6% 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.