Johannisburg township Flag

Johannisburg township

County Seat:
No
Area (mi²):
36.047
State:
Illinois

Johannisburg township is located in Washington County, Illinois. Johannisburg township has a 2025 population of 493. Johannisburg township is currently declining at a rate of -0.8% annually and its population has decreased by -2.95% since the most recent census, which recorded a population of 508 in 2020.

The average household income in Johannisburg township is $110,387 with a poverty rate of 0%.The median age in Johannisburg township is 38.5 years: 45.3 years for males, and 36.4 years for females.

493
Total Population
14
Density (mi²)
-4 -0.8%
Growth

Johannisburg township Population

Johannisburg township Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Johannisburg township includes 100% White, and smaller percentages for and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White451100%

Johannisburg township Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Johannisburg township's average per capita income is $46,929. Household income levels show a median of $89,143. The poverty rate stands at 0%.

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$102,625$131,522
Married Families$102,625-
Households$89,143$110,387
Non Families$24,531$28,559

$46,929

Average Income

$89,143

Median Household Income

0%

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)