Janesville, IL Demographics

A map of Janesville's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	39	70	100.0%	92.1%
Black	0	0	0.0%	0.0%
Asian	0	0	0.0%	0.0%
Hispanic	0	3	0.0%	3.9%
Native American/Other	0	1	0.0%	1.3%
Multiracial	0	2	0.0%	2.6%

Janesville, Illinois has an estimated population of 39, a dramatic decrease from the 76 recorded in the 2020 Census. The population is 100.0% White, 0.0% Black, 0.0% Asian, 0.0% Hispanic, 0.0% Native American/Other, and 0.0% Multiracial. This demographic dot map shows the population of Janesville, with one dot drawn for each person counted by the Census, color-coded by race.

Janesville 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 Janesville, that probability was 14.9% in 2020 and 0.0% in the most recent ACS estimates.

Janesville is ranked the 1413th 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). Janesville was ranked the 1395th most populous place in the 2020 Census.

Janesville's White Population

39 residents of Janesville, or 100.0% of the population, identify as White. The share of White residents in Janesville is significantly higher than in Illinois overall, where 58.1% of the population is White. Janesville ranks 583rd statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Janesville's White population has declined by an estimated 44.3%. White residents' share of Janesville's population has increased from 92.1% to 100.0%.

Janesville is more White than neighboring Lerna (98.7% White), Toledo (92.1% White), Charleston (82.7% White), and Greenup (94.6% White).

Janesville's Black Population

0 residents of Janesville, or 0.0% of the population, identify as Black. The share of Black residents in Janesville is considerably lower than in Illinois overall, where 13.3% of the population is Black. Janesville ranks 1104th statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Janesville's Black population has grown from 0 to an estimated 0. Black residents' share of Janesville's population has remained roughly unchanged at 0.0%.

Janesville is less Black than neighboring Toledo (1.3% Black), and Charleston (6.8% Black).

Janesville's Asian Population

0 residents of Janesville, or 0.0% of the population, identify as Asian. The share of Asian residents in Janesville is lower than in Illinois overall, where 5.9% of the population is Asian. Janesville ranks 1029th statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Janesville's Asian population has grown from 0 to an estimated 0. Asian residents' share of Janesville's population has remained roughly unchanged at 0.0%.

Janesville is less Asian than neighboring Charleston (2% Asian).

Janesville's Hispanic Population

0 residents of Janesville, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in Janesville is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Janesville ranks 608th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Janesville's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of Janesville's population has decreased from 3.9% to 0.0%.

Janesville is less Hispanic than neighboring Toledo (3.2% Hispanic), and Charleston (4.5% Hispanic).

Janesville's Native American/Other Population

0 residents of Janesville, 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 Janesville is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Janesville ranks 76th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Janesville's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Janesville's population has decreased from 1.3% to 0.0%.

Janesville is less Native American/Other than neighboring Charleston (0.8% Native American/Other).

Janesville's Multiracial Population

0 residents of Janesville, or 0.0% of the population, identify as Multiracial. The share of Multiracial residents in Janesville is slightly lower than in Illinois overall, where 3.4% of the population is Multiracial. Janesville ranks 1071st statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Janesville's Multiracial population has declined by an estimated 100.0%. Multiracial residents' share of Janesville's population has decreased from 2.6% to 0.0%.

Janesville is less Multiracial than neighboring Lerna (1.3% Multiracial), Toledo (3.4% Multiracial), Charleston (3.3% Multiracial), and Greenup (5.4% 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.