Sangamon Valley township Flag

Sangamon Valley township

County:
Cass County
County Seat:
No
Area (mi²):
39.641
State:
Illinois

Sangamon Valley township is located in Cass County, Illinois. Sangamon Valley township has a 2025 population of 313. Sangamon Valley township is currently declining at a rate of -0.32% annually and its population has decreased by -3.69% since the most recent census, which recorded a population of 325 in 2020.

The average household income in Sangamon Valley township is $134,964 with a poverty rate of 1.3%.The median age in Sangamon Valley township is 42.7 years: 37.5 years for males, and 61.5 years for females.

313
Total Population
8
Density (mi²)
-1 -0.32%
Growth

Sangamon Valley township Population

Sangamon Valley township Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Sangamon Valley township includes 98.7% White, and smaller percentages for Black or African American and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White45498.7%
Black or African American61.3%

Sangamon Valley township Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Sangamon Valley township's average per capita income is $107,895. Household income levels show a median of $126,218. The poverty rate stands at 1.3%.

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
Families$164,500$173,351
Married Families$164,500-
Households$126,218$134,964
Non Families$125,919$110,356

$107,895

Average Income

$126,218

Median Household Income

1.3%

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)