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 2026 population of 322. Sangamon Valley township is currently declining at a rate of -0.62% annually and its population has decreased by -3.3% since the most recent census, which recorded a population of 333 in 2020.

The median household income in Sangamon Valley township is $128,505 with a poverty rate of 0.81%. The median age in Sangamon Valley township is 38.5 years: 38 years for males, and 39.1 years for females. For every 100 females there are 47.6 males.

322
Total Population
8.1
Density (mi²)
-2 -0.62%
Growth

Sangamon Valley township Population

Sangamon Valley township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026322-2-0.62%
2025324-2-0.61%
2024326-2-0.61%
202332830.92%
2022325-2-0.61%
2021327-6-1.8%
2020333-1-0.3%
2019296-5-1.66%
2018301-4-1.31%
2017305-3-0.97%
2016308-4-1.28%
2015312-6-1.89%
2014318-3-0.93%
2013321-3-0.93%
2012324-5-1.52%
201132910.3%
201032900%

Median Age

Overall: 38.5 years
Female: 39.1 years
Male: 38 years

Sangamon Valley township Adults

There are 370 adults, (165 of whom are seniors) in Sangamon Valley township.

Sex Ratio

Female: 336 (67.7%)
Male: 160 (32.3%)

Demographics

The racial composition of Sangamon Valley township includes 99.19% White, and smaller percentages for Black or African American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White49299.19%
Black or African American40.81%
Race
Population ↓
Percentage (of total)
White9719.56%
Race
Population ↓
Percentage (of total)
White39579.64%
Black or African American40.81%

Sangamon Valley township Marital Status

Economics and Income Statistics

Sangamon Valley township 's average per capita income is $77,011. Household income levels show a median of $128,505. The poverty rate stands at 0.81%.

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$142,917-
Non Families$128,518$115,906
Households$128,505$128,168
Families$104,750$141,580

$77,011

Average Income

$128,505

Median Household Income

0.81%

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)