Thayer Flag

Thayer

County:
Sangamon County
County Seat:
No
Area (mi²):
0.61
State:
Illinois

Thayer is a village located in Sangamon County, Illinois. Thayer has a 2025 population of 604. Thayer is currently declining at a rate of -0.82% annually and its population has decreased by -4.28% since the most recent census, which recorded a population of 631 in 2020.

The average household income in Thayer is $77,931 with a poverty rate of 9.38%.The median age in Thayer is 43.6 years: 46.3 years for males, and 42.6 years for females.

604
Total Population
990
Density (mi²)
-5 -0.82%
Growth

Thayer Population

Thayer Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Thayer includes 94.04% White, and smaller percentages for Two or more races, Asian, Black or African American and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White60094.04%
Two or more races172.66%
Asian111.72%
Black or African American101.57%

Thayer Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Thayer's average per capita income is $42,667. Household income levels show a median of $63,125. The poverty rate stands at 9.38%.

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$114,583-
Families$86,667$100,512
Households$63,125$77,931
Non Families$37,721$50,657

$42,667

Average Income

$63,125

Median Household Income

9.38%

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)