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Seneca, OR
City in Grant County, Oregon.
Population
109
Land area
0.8sq mi
People per sq mi
137
ZIP codes
0
Seneca and its ZIP codes
Seneca at a glance
- Seneca is about 3.1 times as dense as Oregon as a whole.
Local data for Seneca, OR
Counts from official public data
Economy and federal money
Jobs, pay, income and spending are for Grant County. PPP loans are for Seneca.
Unemployment rate
5.6%
Aug 2026, -0.6 pts in a year
Average annual pay
$56,016
2,410 jobs, 2025
Income per person
$58,548
BEA, 2024
Federal spending
$115M
FY 2026, $15,874 per person
Environment and hazard risk
Seneca, OR, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: wildfire
Storm events since 1996
291
Countywide, mostly heavy snow
Flood insurance policies
38
1.0% of homes, county
July high / Jan low
82° / 11°F
13.7 inches of rain a year
Health statistics
Share of adults in Seneca, OR, CDC PLACES estimates
Obesity
32.6%
U.S. 33.3% -0.7 pts
Diabetes
13.4%
U.S. 12.1% +1.3 pts
Smoking
13.3%
U.S. 12.8% +0.5 pts
Uninsured (18-64)
6.6%
U.S. 11.1% -4.5 pts
Cities near Seneca
| Name | Distance | Land area (sq mi) |
|---|---|---|
| Canyon CityTown | 18 mi | 1.4 |
| John DayCity | 19 mi | 2.3 |
| Mount VernonCity | 20 mi | 0.7 |
| Prairie CityCity | 26 mi | 1 |
Frequently asked questions
- What county is Seneca, OR in?
- Seneca is in Grant County, Oregon.
- What is the population of Seneca, OR?
- About 109 people live in Seneca, based on American Community Survey 5-year estimates.
- What cities are near Seneca?
- Nearby places include Canyon City (18 mi), John Day (19 mi), Mount Vernon (20 mi), Prairie City (26 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023