Duncan Flag

Duncan

County:
Sullivan County
County Seat:
No
Area (mi²):
50.03
State:
Missouri

Duncan is located in Sullivan County, Missouri. Duncan has a 2025 population of 228 . Duncan is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The average household income in Duncan is $73,558 with a poverty rate of 8.33%. The median age in Duncan is 48.5 years: 54.5 years for males, and 44.6 years for females. For every 100 females there are 171.4 males.

228
Total Population
5
Density (mi²)

Duncan Population

Duncan Population

Data after 2023 is projected based on recent change

Demographics

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

Population by Race

White (100%)

Race
Population
Percentage (of total)
White228100%

Duncan Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Duncan's average per capita income is $45,100. Household income levels show a median of $70,515. The poverty rate stands at 8.33%.

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$102,083-
Families$100,833$94,730
Households$70,515$73,558
Non Families$63,958$56,988

$45,100

Average Income

$70,515

Median Household Income

8.33%

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)