Petersburg, IL Demographics

A map of Petersburg's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	2,207	2,053	94.3%	90.9%
Multiracial	130	98	5.6%	4.3%
Black	4	23	0.2%	1.0%
Asian	0	20	0.0%	0.9%
Hispanic	0	50	0.0%	2.2%
Native American/Other	0	14	0.0%	0.6%

Petersburg, Illinois has an estimated population of 2,341, an increase from the 2,258 recorded in the 2020 Census. The population is 94.3% White, 5.6% Multiracial, 0.2% Black, 0.0% Asian, 0.0% Hispanic, and 0.0% Native American/Other. This demographic dot map shows the population of Petersburg, with one dot drawn for each person counted by the Census, color-coded by race.

Petersburg 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 Petersburg, that probability was 17.1% in 2020 and 10.8% in the most recent ACS estimates.

Petersburg is ranked the 476th 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). Petersburg was ranked the 482nd most populous place in the 2020 Census.

Petersburg's White Population

2,207 residents of Petersburg, or 94.3% of the population, identify as White. The share of White residents in Petersburg is significantly higher than in Illinois overall, where 58.1% of the population is White. Petersburg ranks 712th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Petersburg's White population has grown by an estimated 7.5%. White residents' share of Petersburg's population has increased from 90.9% to 94.3%.

Petersburg is more White than neighboring Athens (89.2% White). Petersburg is less White than neighboring Lake Petersburg (100% White), Tallula (97.8% White), Greenview (96.1% White), and Oakford (98.4% White).

Petersburg's Black Population

4 residents of Petersburg, or 0.2% of the population, identify as Black. The share of Black residents in Petersburg is considerably lower than in Illinois overall, where 13.3% of the population is Black. Petersburg ranks 572nd statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Petersburg's Black population has declined by an estimated 82.6%. Black residents' share of Petersburg's population has decreased from 1.0% to 0.2%.

Petersburg is more Black than neighboring Lake Petersburg (0% Black), Tallula (0% Black), Greenview (0% Black), and Oakford (0% Black). Petersburg is less Black than neighboring Athens (2.7% Black).

Petersburg's Asian Population

0 residents of Petersburg, or 0.0% of the population, identify as Asian. The share of Asian residents in Petersburg is lower than in Illinois overall, where 5.9% of the population is Asian. Petersburg ranks 421st statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Petersburg's Asian population has declined by an estimated 100.0%. Asian residents' share of Petersburg's population has decreased from 0.9% to 0.0%.

Petersburg is less Asian than neighboring Greenview (0.4% Asian), and Athens (1.3% Asian).

Petersburg's Hispanic Population

0 residents of Petersburg, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in Petersburg is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Petersburg ranks 902nd statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Petersburg's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of Petersburg's population has decreased from 2.2% to 0.0%.

Petersburg is less Hispanic than neighboring Tallula (1.2% Hispanic), Greenview (1.2% Hispanic), and Athens (4.1% Hispanic).

Petersburg's Native American/Other Population

0 residents of Petersburg, 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 Petersburg is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Petersburg ranks 339th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Petersburg's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Petersburg's population has decreased from 0.6% to 0.0%.

Petersburg is less Native American/Other than neighboring Greenview (0.2% Native American/Other).

Petersburg's Multiracial Population

130 residents of Petersburg, or 5.6% of the population, identify as Multiracial. The share of Multiracial residents in Petersburg is slightly higher than in Illinois overall, where 3.4% of the population is Multiracial. Petersburg ranks 414th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Petersburg's Multiracial population has grown by an estimated 32.7%. Multiracial residents' share of Petersburg's population has increased from 4.3% to 5.6%.

Petersburg is more Multiracial than neighboring Lake Petersburg (0% Multiracial), Tallula (1% Multiracial), Greenview (2.1% Multiracial), Athens (2.7% Multiracial), and Oakford (1.6% 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.