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 162. Seneca is currently declining at a rate of -0.61% annually and its population has decreased by -2.41% 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.

162
Total Population
204
Density (mi²)
-1 -0.61%
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 Black or African American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Native American

Black or African American

Asian

Native Hawaiian or Pacific Islander

Other race

Race
Population
Percentage (of total)
White9781.51%
Two or more races1815.13%
Native American43.36%
Black or African American00%
Asian00%
Native Hawaiian or Pacific Islander00%
Other race00%

Seneca Marital Status

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)