Seneca Flag

Seneca

County:
Monroe County
County Seat:
No
Area (mi²):
22.46
State:
Ohio

Seneca is located in Monroe County, Ohio. Seneca has a 2025 population of 418 . Seneca is currently declining at a rate of -0.71% annually and its population has decreased by -3.46% since the most recent census, which recorded a population of 433 in 2020.

The average household income in Seneca is $93,745 with a poverty rate of 2.73%. The median age in Seneca is 11.8 years: 7.5 years for males, and 32.1 years for females. For every 100 females there are 168.7 males.

418
Total Population
19
Density (mi²)
-3 -0.71%
Growth

Seneca Population

Seneca Population

Data after 2023 is projected based on recent change

Demographics

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

Population by Race

White (100%)

Race
Population
Percentage (of total)
White403100%

Seneca Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Seneca's average per capita income is $40,313. Household income levels show a median of $49,491. The poverty rate stands at 2.73%.

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
Households$49,491$93,745
Married Families$48,981-
Families-$107,639
Non Families--

$40,313

Average Income

$49,491

Median Household Income

2.73%

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)