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 2026 population of 160. Seneca is currently declining at a rate of -0.62% annually and its population has decreased by -3.61% since the most recent census, which recorded a population of 166 in 2020.

The median household income in Seneca is $39,821 with a poverty rate of 22.02%. The median age in Seneca is 67.8 years: 61.5 years for males, and 73.1 years for females. For every 100 females there are 81.7 males.

160
Total Population
201
Density (mi²)
-1 -0.62%
Growth

Seneca Population

Seneca Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026160-1-0.62%
2025161-1-0.62%
2024162-3-1.82%
202316500%
2022165-1-0.6%
202116600%
202016600%
2019225-1-0.44%
201822683.67%
2017218115.31%
201620700%
2015207147.25%
2014193-2-1.03%
2013195-2-1.02%
2012197-1-0.51%
2011198-1-0.5%
201020010.5%

Median Age

Overall: 67.8 years
Female: 73.1 years
Male: 61.5 years

Seneca Adults

There are 99 adults, (56 of whom are seniors) in Seneca.

Sex Ratio

Female: 60 (55%)
Male: 49 (45%)

Demographics

The racial composition of Seneca includes 64.22% White, 3.67% Native American, and smaller percentages for and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White7064.22%
Two or more races3532.11%
Native American43.67%
Race
Population ↓
Percentage (of total)
Two or more races109.17%
Race
Population ↓
Percentage (of total)
White7064.22%
Two or more races2522.94%
Native American43.67%

Seneca Marital Status

Economics and Income Statistics

Seneca 's average per capita income is $38,036. Household income levels show a median of $39,821. The poverty rate stands at 22.02%.

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$86,563$101,718
Married Families$86,563-
Households$39,821$53,665
Non Families-$32,088

$38,036

Average Income

$39,821

Median Household Income

22.02%

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)