Flat Rock, IL Demographics

A map of Flat Rock's Population by Race

Flat Rock, Illinois has an estimated population of 337, an increase from the 323 recorded in the 2020 Census. The population is 95.3% White, 4.7% Multiracial, 0.0% Black, 0.0% Asian, 0.0% Hispanic, and 0.0% Native American/Other. This demographic dot map shows the population of Flat Rock, with one dot drawn for each person counted by the Census, color-coded by race.

Flat Rock 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 Flat Rock, that probability was 15.1% in 2020 and 9.0% in the most recent ACS estimates.

Flat Rock is ranked the 1049th 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). Flat Rock was ranked the 1051st most populous place in the 2020 Census.

Flat Rock's White Population

321 residents of Flat Rock, or 95.3% of the population, identify as White. The share of White residents in Flat Rock is significantly higher than in Illinois overall, where 58.1% of the population is White. Flat Rock ranks 610th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Flat Rock's White population has grown by an estimated 8.1%. White residents' share of Flat Rock's population has increased from 92.0% to 95.3%.

Flat Rock is more White than neighboring Palestine (89.9% White), Robinson (84.6% White), Russellville (62.1% White), and Lawrenceville (83.5% White). Flat Rock is less White than neighboring Stoy (100% White).

Flat Rock's Black Population

0 residents of Flat Rock, or 0.0% of the population, identify as Black. The share of Black residents in Flat Rock is considerably lower than in Illinois overall, where 13.3% of the population is Black. Flat Rock ranks 604th statewide in terms of Black residents as a share of the population, out of 1,461 places.

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

Flat Rock is less Black than neighboring Robinson (8.7% Black), Russellville (6.9% Black), and Lawrenceville (4.1% Black).

Flat Rock's Asian Population

0 residents of Flat Rock, or 0.0% of the population, identify as Asian. The share of Asian residents in Flat Rock is lower than in Illinois overall, where 5.9% of the population is Asian. Flat Rock ranks 811th statewide in terms of Asian residents as a share of the population, out of 1,461 places.

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

Flat Rock is less Asian than neighboring Palestine (0.3% Asian), Robinson (0.2% Asian), and Lawrenceville (1.4% Asian).

Flat Rock's Hispanic Population

0 residents of Flat Rock, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in Flat Rock is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Flat Rock ranks 1381st statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

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

Flat Rock is less Hispanic than neighboring Palestine (2.7% Hispanic), and Robinson (5.1% Hispanic).

Flat Rock's Native American/Other Population

0 residents of Flat Rock, 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 Flat Rock is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Flat Rock ranks 156th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

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

Flat Rock is less Native American/Other than neighboring Palestine (0.4% Native American/Other), Robinson (0.2% Native American/Other), and Lawrenceville (0.3% Native American/Other).

Flat Rock's Multiracial Population

16 residents of Flat Rock, or 4.7% of the population, identify as Multiracial. The share of Multiracial residents in Flat Rock is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Flat Rock ranks 172nd statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Flat Rock's Multiracial population has declined by an estimated 11.1%. Multiracial residents' share of Flat Rock's population has decreased from 5.6% to 4.7%.

Flat Rock is more Multiracial than neighboring Robinson (1.3% Multiracial), and Stoy (0% Multiracial). Flat Rock is less Multiracial than neighboring Palestine (6.6% Multiracial), Russellville (31% Multiracial), and Lawrenceville (10.8% 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.