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 2026 population of 431. Buffalo is currently declining at a rate of -0.46% annually and its population has decreased by -3.36% since the most recent census, which recorded a population of 446 in 2020.

The median household income in Buffalo is $56,250 with a poverty rate of 16.6%. The median age in Buffalo is 45.9 years: 44 years for males, and 45.9 years for females. For every 100 females there are 92.0 males.

431
Total Population
1,250
Density (mi²)
-2 -0.46%
Growth

Buffalo Population

Buffalo Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026431-2-0.46%
2025433-3-0.69%
2024436-1-0.23%
2023437-1-0.23%
2022438-5-1.13%
2021443-3-0.67%
2020446-1-0.22%
2019476-5-1.04%
2018481-4-0.82%
2017485-4-0.82%
2016489-4-0.81%
2015493-2-0.4%
2014495-4-0.8%
2013499-2-0.4%
201250100%
2011501-2-0.4%
201049900%

Median Age

Overall: 45.9 years
Female: 45.9 years
Male: 44 years

Buffalo Adults

There are 371 adults, (112 of whom are seniors) in Buffalo.

Sex Ratio

Female: 251 (52.1%)
Male: 231 (47.9%)

Demographics

The racial composition of Buffalo includes 87.14% White, and smaller percentages for Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White42087.14%
Two or more races6112.66%
Asian10.21%
Race
Population ↓
Percentage (of total)
Two or more races71.45%
Race
Population ↓
Percentage (of total)
White42087.14%
Two or more races5411.2%
Asian10.21%

Buffalo Marital Status

Economics and Income Statistics

Buffalo 's average per capita income is $51,719. Household income levels show a median of $56,250. The poverty rate stands at 16.6%.

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$98,750-
Families$74,107$95,224
Households$56,250$73,676
Non Families$17,500$30,080

$51,719

Average Income

$56,250

Median Household Income

16.6%

Poverty Rate

Nearby Cities

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)