LaSalle County Demographics

A map of LaSalle County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	89,301	90,445	82.1%	82.5%
Hispanic	12,161	11,456	11.2%	10.4%
Multiracial	3,338	3,930	3.1%	3.6%
Black	2,715	2,514	2.5%	2.3%
Asian	911	855	0.8%	0.8%
Native American/Other	288	458	0.3%	0.4%

LaSalle County, Illinois has an estimated population of 108,714, a less than 1% change from the 109,658 recorded in the 2020 Census. The population is 82.1% White, 11.2% Hispanic, 3.1% Multiracial, 2.5% Black, 0.8% Asian, and 0.3% Native American/Other. This demographic dot map shows the population of LaSalle County, with one dot drawn for each person counted by the Census, color-coded by race.

LaSalle is about as racially diverse as it was in 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 LaSalle County, that probability was 30.7% in 2020 and 31.1% in the most recent ACS estimates.

LaSalle County is ranked the 17th most populous county in Illinois, out of 102 counties. LaSalle County was ranked the 17th most populous county in the 2020 Census.

LaSalle County's White Population

89,301 residents of LaSalle County, or 82.1% of the population, identify as White. The share of White residents in LaSalle County is significantly higher than in Illinois overall, where 58.1% of the population is White. LaSalle County ranks 72nd statewide in terms of White residents as a share of the population, out of 102 counties.

Since the 2020 Census, LaSalle County's White population has declined by an estimated 1.3%. White residents' share of LaSalle County's population has remained roughly unchanged at 82.1%.

LaSalle County is more White than neighboring Kendall County (62% White). LaSalle County is less White than neighboring Putnam County (88.6% White), Grundy County (82.4% White), Marshall County (92.1% White), and Livingston County (87.7% White).

LaSalle County's Black Population

2,715 residents of LaSalle County, or 2.5% of the population, identify as Black. The share of Black residents in LaSalle County is considerably lower than in Illinois overall, where 13.3% of the population is Black. LaSalle County ranks 51st statewide in terms of Black residents as a share of the population, out of 102 counties.

Since the 2020 Census, LaSalle County's Black population has grown by an estimated 8.0%. Black residents' share of LaSalle County's population has remained roughly unchanged at 2.5%.

LaSalle County is more Black than neighboring Putnam County (0.3% Black), Grundy County (2.3% Black), and Marshall County (0.4% Black). LaSalle County is less Black than neighboring Kendall County (7.6% Black), and Livingston County (3.4% Black).

LaSalle County's Asian Population

911 residents of LaSalle County, or 0.8% of the population, identify as Asian. The share of Asian residents in LaSalle County is lower than in Illinois overall, where 5.9% of the population is Asian. LaSalle County ranks 33rd statewide in terms of Asian residents as a share of the population, out of 102 counties.

Since the 2020 Census, LaSalle County's Asian population has grown by an estimated 6.5%. Asian residents' share of LaSalle County's population has remained roughly unchanged at 0.8%.

LaSalle County is more Asian than neighboring Putnam County (0.7% Asian), Grundy County (0.6% Asian), Marshall County (0.1% Asian), and Livingston County (0.6% Asian). LaSalle County is less Asian than neighboring Kendall County (3.5% Asian).

LaSalle County's Hispanic Population

12,161 residents of LaSalle County, or 11.2% of the population, identify as Hispanic. The share of Hispanic residents in LaSalle County is lower than in Illinois overall, where 18.8% of the population is Hispanic. LaSalle County ranks 18th statewide in terms of Hispanic residents as a share of the population, out of 102 counties.

Since the 2020 Census, LaSalle County's Hispanic population has grown by an estimated 6.2%. Hispanic residents' share of LaSalle County's population has increased from 10.4% to 11.2%.

LaSalle County is more Hispanic than neighboring Putnam County (6.6% Hispanic), Marshall County (3.5% Hispanic), and Livingston County (5.8% Hispanic). LaSalle County is less Hispanic than neighboring Grundy County (12% Hispanic), and Kendall County (22.4% Hispanic).

LaSalle County's Native American/Other Population

288 residents of LaSalle County, or 0.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in LaSalle County is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. LaSalle County ranks 48th statewide in terms of Native American/Other residents as a share of the population, out of 102 counties.

Since the 2020 Census, LaSalle County's Native American/Other population has declined by an estimated 37.1%. Native American/Other residents' share of LaSalle County's population has remained roughly unchanged at 0.3%.

LaSalle County is more Native American/Other than neighboring Marshall County (0.2% Native American/Other), and Livingston County (0.2% Native American/Other). LaSalle County is less Native American/Other than neighboring Putnam County (0.6% Native American/Other), and Kendall County (0.5% Native American/Other).

LaSalle County's Multiracial Population

3,338 residents of LaSalle County, or 3.1% of the population, identify as Multiracial. The share of Multiracial residents in LaSalle County is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. LaSalle County ranks 39th statewide in terms of Multiracial residents as a share of the population, out of 102 counties.

Since the 2020 Census, LaSalle County's Multiracial population has declined by an estimated 15.1%. Multiracial residents' share of LaSalle County's population has decreased from 3.6% to 3.1%.

LaSalle County is more Multiracial than neighboring Grundy County (2.4% Multiracial), and Livingston County (2.4% Multiracial). LaSalle County is less Multiracial than neighboring Putnam County (3.2% Multiracial), Kendall County (3.9% Multiracial), and Marshall County (3.7% 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.