Gallatin County Demographics

A map of Gallatin County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	4,580	4,683	95.0%	94.7%
Multiracial	85	154	1.8%	3.1%
Hispanic	57	53	1.2%	1.1%
Black	54	25	1.1%	0.5%
Asian	37	23	0.8%	0.5%
Native American/Other	6	8	0.1%	0.2%

Gallatin County, Illinois has an estimated population of 4,819, a slight decrease from the 4,946 recorded in the 2020 Census. The population is 95.0% White, 1.8% Multiracial, 1.2% Hispanic, 1.1% Black, 0.8% Asian, and 0.1% Native American/Other. This demographic dot map shows the population of Gallatin County, with one dot drawn for each person counted by the Census, color-coded by race.

Gallatin has become slightly 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 Gallatin County, that probability was 10.2% in 2020 and 9.6% in the most recent ACS estimates.

Gallatin County is ranked the 99th most populous county in Illinois, out of 102 counties. Gallatin County was ranked the 99th most populous county in the 2020 Census.

Gallatin County's White Population

4,580 residents of Gallatin County, or 95.0% of the population, identify as White. The share of White residents in Gallatin County is significantly higher than in Illinois overall, where 58.1% of the population is White. Gallatin County ranks 13th statewide in terms of White residents as a share of the population, out of 102 counties.

Since the 2020 Census, Gallatin County's White population has declined by an estimated 2.2%. White residents' share of Gallatin County's population has remained roughly unchanged at 95.0%.

Gallatin County is more White than neighboring Union County (88.1% White), Saline County (91.3% White), and Crittenden County (93.8% White). Gallatin County is less White than neighboring Hardin County (95.7% White), and White County (95.2% White).

Gallatin County's Black Population

54 residents of Gallatin County, or 1.1% of the population, identify as Black. The share of Black residents in Gallatin County is considerably lower than in Illinois overall, where 13.3% of the population is Black. Gallatin County ranks 76th statewide in terms of Black residents as a share of the population, out of 102 counties.

Since the 2020 Census, Gallatin County's Black population has grown by an estimated 116.0%. Black residents' share of Gallatin County's population has increased from 0.5% to 1.1%.

Gallatin County is more Black than neighboring White County (0.6% Black), and Crittenden County (0.4% Black). Gallatin County is less Black than neighboring Hardin County (1.4% Black), Union County (6.9% Black), and Saline County (3.1% Black).

Gallatin County's Asian Population

37 residents of Gallatin County, or 0.8% of the population, identify as Asian. The share of Asian residents in Gallatin County is lower than in Illinois overall, where 5.9% of the population is Asian. Gallatin County ranks 58th statewide in terms of Asian residents as a share of the population, out of 102 counties.

Since the 2020 Census, Gallatin County's Asian population has grown by an estimated 60.9%. Asian residents' share of Gallatin County's population has remained roughly unchanged at 0.8%.

Gallatin County is more Asian than neighboring Hardin County (0% Asian), Union County (0.1% Asian), Saline County (0.5% Asian), White County (0.3% Asian), and Crittenden County (0.3% Asian).

Gallatin County's Hispanic Population

57 residents of Gallatin County, or 1.2% of the population, identify as Hispanic. The share of Hispanic residents in Gallatin County is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Gallatin County ranks 97th statewide in terms of Hispanic residents as a share of the population, out of 102 counties.

Since the 2020 Census, Gallatin County's Hispanic population has grown by an estimated 7.5%. Hispanic residents' share of Gallatin County's population has remained roughly unchanged at 1.2%.

Gallatin County is more Hispanic than neighboring Hardin County (0.9% Hispanic). Gallatin County is less Hispanic than neighboring Union County (1.7% Hispanic), Saline County (2.2% Hispanic), White County (1.6% Hispanic), and Crittenden County (1.8% Hispanic).

Gallatin County's Native American/Other Population

6 residents of Gallatin County, or 0.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Gallatin County is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Gallatin County ranks 98th statewide in terms of Native American/Other residents as a share of the population, out of 102 counties.

Since the 2020 Census, Gallatin County's Native American/Other population has declined by an estimated 25.0%. Native American/Other residents' share of Gallatin County's population has remained roughly unchanged at 0.1%.

Gallatin County is less Native American/Other than neighboring Hardin County (0.2% Native American/Other), Union County (0.4% Native American/Other), Saline County (0.2% Native American/Other), and Crittenden County (0.7% Native American/Other).

Gallatin County's Multiracial Population

85 residents of Gallatin County, or 1.8% of the population, identify as Multiracial. The share of Multiracial residents in Gallatin County is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Gallatin County ranks 65th statewide in terms of Multiracial residents as a share of the population, out of 102 counties.

Since the 2020 Census, Gallatin County's Multiracial population has declined by an estimated 44.8%. Multiracial residents' share of Gallatin County's population has decreased from 3.1% to 1.8%.

Gallatin County is more Multiracial than neighboring Hardin County (1.7% Multiracial). Gallatin County is less Multiracial than neighboring Union County (2.7% Multiracial), Saline County (2.6% Multiracial), White County (2.2% Multiracial), and Crittenden County (3.1% 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.