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 162. Seneca is currently declining at a rate of -1.82% annually and its population has decreased by -2.41% since the most recent census, which recorded a population of 166 in 2020.

162
Total Population
204
Density (mi²)
-3 -1.82%
Growth

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)