Demographics of Gallatin County, Illinois

Gallatin County, Illinois had 4,616 people on July 1, 2025, by the Census Bureau’s estimate: −317 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Gallatin County, in four figures

4,616
Population: July 1, 2025, Vintage 2025 estimate.; −6.4%
Change since July 2020: −317 people.; 46.7 ±0.5
Median age: ACS 2020–⁠2024.; $59,219 ±$6,209
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Gallatin County, Illinois's population shrank 6.4% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Gallatin County, Illinois's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Gallatin County, Illinois's population shrank 6.4% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Gallatin County, Illinois's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	4,933	100.0	100.0
2021	4,896	99.2	100.2
2022	4,831	97.9	100.7
2023	4,698	95.2	101.6
2024	4,683	94.9	102.5
2025	4,616	93.6	103.1

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Population of Gallatin County, Illinois on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	4,933	−9	−12	0	+3
2021	4,896	−37	−42	0	+4
2022	4,831	−65	−50	+1	−14
2023	4,698	−133	−46	0	−87
2024	4,683	−15	−48	0	+33
2025	4,616	−67	−54	−1	−12

Age, 2020–2024

The median age is 46.7 ±0.5: for men 45.1 ±1.0 and for women 48.7 ±0.9. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Gallatin County by age, ACS 2020–2024
Age	People	Share	Illinois	United States
Under 5	210 ±16	4.4% ±0.3	5.4% ±<0.1	5.6% ±<0.1
5 to 17	776 ±85	16.1% ±1.8	16.4% ±0.1	16.3% ±<0.1
18 to 24	288 ±70	6.0% ±1.4	9.1% ±<0.1	9.1% ±<0.1
25 to 44	1,000 ±74	20.8% ±1.5	26.9% ±0.1	26.9% ±<0.1
45 to 64	1,328 ±127	27.6% ±2.6	25.2% ±0.1	24.8% ±<0.1
65 and over	1,217 ±124	25.3% ±2.6	17.0% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $59,219 ±$6,209, and income per person $34,560 ±$2,771, in 2024 dollars. The median is $83,390 ±$362 in Illinois and $80,734 ±$166 in the United States.

Households by income

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Households in Gallatin County by income, ACS 2020–2024
Household income	Households	Share	Illinois	United States
Under $25,000	437 ±85	20.8% ±3.9	14.6% ±0.1	14.6% ±<0.1
$25,000 to $49,999	468 ±103	22.3% ±4.8	16.0% ±0.2	16.7% ±<0.1
$50,000 to $74,999	399 ±115	19.0% ±5.4	14.8% ±0.1	15.5% ±<0.1
$75,000 to $99,999	262 ±68	12.5% ±3.2	12.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	259 ±72	12.3% ±3.4	18.0% ±0.2	17.5% ±<0.1
$150,000 to $199,999	169 ±52	8.1% ±2.5	10.1% ±0.1	9.6% ±<0.1
$200,000 or more	104 ±43	5.0% ±2.0	13.8% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Gallatin County by age, ACS 2020–2024
Age	Below poverty	Rate	Illinois	United States
All ages	650 ±116	13.6% ±2.4	11.8% ±0.1	12.5% ±0.1
Under 18	139 ±50	14.2% ±4.9	15.1% ±0.2	16.1% ±0.1
18 to 59	344 ±77	15.5% ±3.4	11.0% ±0.1	11.6% ±0.1
60 and over	167 ±58	10.5% ±3.5	10.6% ±0.1	11.0% ±<0.1

Housing, 2020–2024

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Housing in Gallatin County, ACS 2020–2024
Measure	Gallatin County	Illinois	United States
Housing units	2,505 ±29	5,457,452 ±471	143,775,355 ±10,234
Occupied	83.8% ±3.3	92.3% ±0.1	89.9% ±0.1
Vacant	16.2% ±3.3	7.7% ±0.1	10.1% ±0.1
Owner occupied	77.4% ±4.2	67.1% ±0.3	65.2% ±0.3
Renter occupied	22.6% ±4.4	32.9% ±0.2	34.8% ±0.1
Median home value	$82,900 ±$3,482	$263,300 ±$797	$332,700 ±$236
Median gross rent	$541 ±$80	$1,274 ±$5	$1,413 ±$2
Median year built	1969 ±4	1971 ±2	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Gallatin County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Illinois	United States
Hispanic or Latino	8 to 106	0.2% to 2.2%	18.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	4,580 ±13	95.0% ±0.3	58.1% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	10 to 98	0.2% to 2.0%	13.3% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	5 to 69	0.1% to 1.4%	5.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	1 to 11	< 0.1% to 0.2%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 13	0% to 0.3%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 13	0% to 0.3%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	85 ±36	1.8% ±0.7	3.4% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Gallatin County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Illinois	United States
Born in the state	3,392 ±131	70.4% ±2.7	66.5% ±0.1	57.3% ±<0.1
Born in another state	1,390 ±132	28.8% ±2.7	17.5% ±0.1	26.9% ±<0.1
Born a citizen outside the states	0 to 7	0% to 0.1%	1.3% ±<0.1	1.7% ±<0.1
Born abroad	10 to 60	0.2% to 1.2%	14.7% ±0.1	14.1% ±<0.1
Naturalized citizens	4 to 52	0.1% to 1.1%	7.7% ±0.1	7.4% ±<0.1
Not citizens	0 to 16	0% to 0.3%	7.0% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Gallatin County among the counties of Illinois

98th of 102 by population, July 2025. Every one is listed on the Illinois page.

Counties of Illinois near Gallatin County in population, July 2025
County	July 2025	Change since 2020
Edwards County	5,898	−5.0%
Putnam County	5,619	−0.1%
Stark County	5,319	−1.2%
Scott County	4,866	−4.0%
Pulaski County	4,820	−6.9%
Gallatin County	4,616	−6.4%
Alexander County	4,570	−11.6%
Calhoun County	4,300	−2.3%
Pope County	3,672	−2.2%
Hardin County	3,588	−1.8%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026