Sidney Flag

Sidney

County:
Kennebec County
County Seat:
No
Area (mi²):
42.247
State:
Maine

Sidney is located in Kennebec County, Maine. Sidney has a 2025 population of 4,956. Sidney is currently growing at a rate of 1.1% annually and its population has increased by 6.26% since the most recent census, which recorded a population of 4,664 in 2020.

The average household income in Sidney is $105,401 with a poverty rate of 5.87%.The median age in Sidney is 39.7 years: 37.8 years for males, and 42 years for females.

5K
Total Population
117
Density (mi²)
54 1.1%
Growth

Sidney Population

Sidney Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Sidney includes 96.66% White, and smaller percentages for Two or more races, Asian and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White4,56896.66%
Two or more races851.8%
Asian731.54%

Sidney Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Sidney's average per capita income is $50,938. Household income levels show a median of $81,250. The poverty rate stands at 5.87%.

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$100,263-
Families$91,224$110,638
Households$81,250$105,401
Non Families$47,949$53,927

$50,938

Average Income

$81,250

Median Household Income

5.87%

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)