Buffalo, IL Demographics

A map of Buffalo's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	420	417	87.1%	93.3%
Multiracial	54	20	11.2%	4.5%
Hispanic	7	4	1.5%	0.9%
Asian	1	2	0.2%	0.4%
Black	0	2	0.0%	0.4%
Native American/Other	0	2	0.0%	0.4%

Buffalo, Illinois has an estimated population of 482, an increase from the 447 recorded in the 2020 Census. The population is 87.1% White, 11.2% Multiracial, 1.5% Hispanic, 0.2% Asian, 0.0% Black, and 0.0% Native American/Other. This demographic dot map shows the population of Buffalo, with one dot drawn for each person counted by the Census, color-coded by race.

Buffalo has become considerably more 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 Buffalo, that probability was 12.8% in 2020 and 22.8% in the most recent ACS estimates.

Buffalo is ranked the 947th 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). Buffalo was ranked the 959th most populous place in the 2020 Census.

Buffalo's White Population

420 residents of Buffalo, or 87.1% of the population, identify as White. The share of White residents in Buffalo is significantly higher than in Illinois overall, where 58.1% of the population is White. Buffalo ranks 433rd statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Buffalo's White population has remained roughly the same. White residents' share of Buffalo's population has decreased from 93.3% to 87.1%.

Buffalo is less White than neighboring Mechanicsburg (91.5% White), Dawson (96.5% White), Cornland (100% White), Riverton (94% White), and Spaulding (91.5% White).

Buffalo's Black Population

0 residents of Buffalo, or 0.0% of the population, identify as Black. The share of Black residents in Buffalo is considerably lower than in Illinois overall, where 13.3% of the population is Black. Buffalo ranks 884th statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Buffalo's Black population has declined by an estimated 100.0%. Black residents' share of Buffalo's population has remained roughly unchanged at 0.0%.

Buffalo is less Black than neighboring Dawson (0.4% Black), Riverton (2.3% Black), and Spaulding (3.9% Black).

Buffalo's Asian Population

1 residents of Buffalo, or 0.2% of the population, identify as Asian. The share of Asian residents in Buffalo is lower than in Illinois overall, where 5.9% of the population is Asian. Buffalo ranks 684th statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Buffalo's Asian population has declined by an estimated 50.0%. Asian residents' share of Buffalo's population has remained roughly unchanged at 0.2%.

Buffalo is more Asian than neighboring Mechanicsburg (0% Asian), Dawson (0% Asian), and Cornland (0% Asian). Buffalo is less Asian than neighboring Riverton (0.6% Asian), and Spaulding (1.3% Asian).

Buffalo's Hispanic Population

7 residents of Buffalo, or 1.5% of the population, identify as Hispanic. The share of Hispanic residents in Buffalo is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Buffalo ranks 1274th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Buffalo's Hispanic population has grown by an estimated 75.0%. Hispanic residents' share of Buffalo's population has increased from 0.9% to 1.5%.

Buffalo is more Hispanic than neighboring Mechanicsburg (1.1% Hispanic), Dawson (1.3% Hispanic), Cornland (0% Hispanic), and Spaulding (0.5% Hispanic). Buffalo is less Hispanic than neighboring Riverton (1.9% Hispanic).

Buffalo's Native American/Other Population

0 residents of Buffalo, 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 Buffalo is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Buffalo ranks 618th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Buffalo's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Buffalo's population has remained roughly unchanged at 0.0%.

Buffalo is less Native American/Other than neighboring Spaulding (1% Native American/Other).

Buffalo's Multiracial Population

54 residents of Buffalo, or 11.2% of the population, identify as Multiracial. The share of Multiracial residents in Buffalo is higher than in Illinois overall, where 3.4% of the population is Multiracial. Buffalo ranks 382nd statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Buffalo's Multiracial population has grown by an estimated 170.0%. Multiracial residents' share of Buffalo's population has increased from 4.5% to 11.2%.

Buffalo is more Multiracial than neighboring Mechanicsburg (7.4% Multiracial), Dawson (1.9% Multiracial), Cornland (0% Multiracial), Riverton (1.2% Multiracial), and Spaulding (1.9% 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.