Dorchester Flag

Dorchester

County:
Macoupin County
County Seat:
No
Area (mi²):
35.979
State:
Illinois

Dorchester is located in Macoupin County, Illinois. Dorchester has a 2025 population of 1,455 . Dorchester is currently declining at a rate of -0.55% annually and its population has decreased by -2.94% since the most recent census, which recorded a population of 1,499 in 2020.

The average household income in Dorchester is $88,259 with a poverty rate of 6.19%. The median age in Dorchester is 38.3 years: 39.1 years for males, and 37.6 years for females. For every 100 females there are 106.3 males.

1.5K
Total Population
40
Density (mi²)
-8 -0.55%
Growth

Dorchester Population

Dorchester Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Dorchester includes 96.89% White, and smaller percentages for and multiracial populations.

Population by Race

White (96.89%)

Two or more races (3.11%)

Race
Population
Percentage (of total)
White1,65396.89%
Two or more races533.11%

Dorchester Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Dorchester's average per capita income is $42,177. Household income levels show a median of $69,360. The poverty rate stands at 6.19%.

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$86,500-
Families$85,792$100,795
Households$69,360$88,259
Non Families-$43,230

$42,177

Average Income

$69,360

Median Household Income

6.19%

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)