Buffalo Flag

Buffalo

County:
Sangamon County
County Seat:
No
Area (mi²):
0.345
State:
Illinois

Buffalo is a village located in Sangamon County, Illinois. Buffalo has a 2025 population of 427. Buffalo is currently declining at a rate of -0.93% annually and its population has decreased by -4.26% since the most recent census, which recorded a population of 446 in 2020.

The average household income in Buffalo is $81,370 with a poverty rate of 13.09%. The median age in Buffalo is 48.6 years: 48.8 years for males, and 46.2 years for females.

427
Total Population
1,238
Density (mi²)
-4 -0.93%
Growth

Buffalo Population

Buffalo Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Buffalo includes 87.65% White, and smaller percentages for Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Other race

Race
Population
Percentage (of total)
White35587.65%
Two or more races4811.85%
Asian20.49%
Black or African American00%
Native American00%
Native Hawaiian or Pacific Islander00%
Other race00%

Buffalo Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Buffalo's average per capita income is $53,125. Household income levels show a median of $67,321. The poverty rate stands at 13.09%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$100,278-
Families$97,813$103,514
Households$67,321$81,370
Non Families$17,500$39,698

$53,125

Average Income

$67,321

Median Household Income

13.09%

Poverty Rate

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)