Seneca Flag

Seneca

County:
Grant County
County Seat:
No
Area (mi²):
0.795
State:
Oregon

Seneca is a city located in Grant County, Oregon. Seneca has a 2025 population of 161 . Seneca is currently declining at a rate of -0.62% annually and its population has decreased by -3.01% since the most recent census, which recorded a population of 166 in 2020.

The average household income in Seneca is $71,578 with a poverty rate of 10.08%. The median age in Seneca is 58.8 years: 60.5 years for males, and 58.5 years for females. For every 100 females there are 54.5 males.

161
Total Population
203
Density (mi²)
-1 -0.62%
Growth

Seneca Population

Seneca Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Seneca includes 81.51% White, 3.36% Native American, and smaller percentages for and multiracial populations.

Population by Race

White (81.51%)

Two or more races (15.13%)

Native American (3.36%)

Race
Population
Percentage (of total)
White9781.51%
Two or more races1815.13%
Native American43.36%

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 $36,979. Household income levels show a median of $76,250. The poverty rate stands at 10.08%.

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
Families$88,636$94,635
Married Families$88,636-
Households$76,250$71,578
Non Families$57,500$48,518

$36,979

Average Income

$76,250

Median Household Income

10.08%

Poverty Rate

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)