Map of Seneca city, Oregon

Seneca is a city in Grant County, Oregon, United States. It is located in the Blue Mountains about 23 miles (37 km) south of Canyon City, on U.S. Route 395, on the edge of the Malheur National Forest. The population was 199 at the 2010 census.

Seneca city overview:
Name:	Seneca city
LSAD Code:	25
LSAD Description:	city (suffix)
State:	Oregon
County:	Grant County
Incorporated:	1970
Elevation:	4,690 ft (1,430 m)
Total Area:	0.80 sq mi (2.06 km²)
Land Area:	0.80 sq mi (2.06 km²)
Water Area:	0.00 sq mi (0.00 km²)
Total Population:	165
Population Density:	207.55/sq mi (80.14/km²)
ZIP code:	97873
Area code:	541
FIPS code:	4166200
GNISfeature ID:	1149228

Online Interactive Map

Seneca online map. Source: Basemap layers from Google Map, Open Street Map (OSM), Arcgisonline, Wmflabs. Boundary Data from Database of Global Administrative Areas.

Seneca location map. Where is Seneca city?

Seneca location on the U.S. Map. Where is Seneca city. — Seneca location on the U.S. Map.

Seneca location on the Oregon map. Where is Seneca city. — Location of Seneca in Oregon.

History

Seneca post office was established in 1895 and named by postmaster Minnie Southworth for her brother-in-law, prominent Portland judge Seneca Smith.

While early homesteaders moved into the valley in the late 1800s, Seneca only began growing in the 1929 when it became the northern terminus of the now-vacated Oregon and Northwestern Railroad, owned by the Edward Hines Lumber Company, which extended south to Burns. At that time, large-scale shipping of Ponderosa Pine logs from Seneca and the surrounding national forest began to the Hines sawmill in Hines. The company established a planing mill and railroad shops in Seneca, and it became essentially a company town. In 1940 Seneca’s population was 275. Logging in the area began to decline in the 1970s, and the Hines company ceased operations of its lumber mills and railroad in 1984. The town was incorporated as a city in 1970 as lumber company control began to wane. According to the 1980 census, Seneca’s population was 285. The estimated population in 2007 was 270.

Seneca Road Map

Seneca city Satellite Map

Geography

According to the United States Census Bureau, the city has a total area of 0.80 square miles (2.07 km), all land.

Situated at the confluence of Bear Creek and the Silvies River, Seneca is in Bear Valley at the northern edge of the Great Basin.

Climate

Seneca has a semi-arid influenced subarctic climate (Köppen climate classification Dsc) with warm daytime temperatures in summer and cool to cold nighttime temperatures all year. Average high temperatures throughout the year are relatively mild for a subarctic climate. It is right on the border of the regular semi-arid continental climate with the fourth warmest month of the year straddling 50 °F (10 °C).

Seneca experiences the coolest weather in Grant County and has the distinction of the coldest official temperature recorded in Oregon: −54 °F (−48 °C) in 1933.