Dorchester Flag

Dorchester

County:
Macoupin County
County Seat:
No
Area (mi²):
0.722
State:
Illinois

Dorchester is a village located in Macoupin County, Illinois. Dorchester has a 2026 population of 123. Dorchester is currently declining at a rate of -0.81% annually and its population has decreased by -4.65% since the most recent census, which recorded a population of 129 in 2020.

The median household income in Dorchester is $127,500 with a poverty rate of 0.55%. The median age in Dorchester is 43.5 years: 55.3 years for males, and 37.5 years for females. For every 100 females there are 100.0 males.

123
Total Population
170
Density (mi²)
-1 -0.81%
Growth

Dorchester Population

Dorchester Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026123-1-0.81%
2025124-1-0.8%
202412500%
202312500%
2022125-2-1.57%
2021127-2-1.55%
202012900%
2019138-2-1.43%
201814000%
2017140-2-1.41%
2016142-2-1.39%
2015144-2-1.37%
2014146-1-0.68%
2013147-2-1.34%
2012149-2-1.32%
201115100%
201015100%

Median Age

Overall: 43.5 years
Female: 37.5 years
Male: 55.3 years

Dorchester Adults

There are 122 adults, (45 of whom are seniors) in Dorchester.

Sex Ratio

Female: 91 (50%)
Male: 91 (50%)

Demographics

The racial composition of Dorchester includes 98.35% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White17998.35%
Two or more races31.65%
Race
Population ↓
Percentage (of total)
White17998.35%
Two or more races31.65%

Dorchester Marital Status

Economics and Income Statistics

Dorchester 's average per capita income is $73,750. Household income levels show a median of $127,500. The poverty rate stands at 0.55%.

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$135,583-
Families$135,250$145,847
Households$127,500$132,057
Non Families$30,625$31,600

$73,750

Average Income

$127,500

Median Household Income

0.55%

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)