Seneca, OR Demographics

A map of Seneca's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	70	152	64.2%	92.1%
Multiracial	25	11	22.9%	6.7%
Hispanic	10	2	9.2%	1.2%
Native American/Other	4	0	3.7%	0.0%
Black	0	0	0.0%	0.0%
Asian	0	0	0.0%	0.0%

Seneca, Oregon has an estimated population of 109, a dramatic decrease from the 165 recorded in the 2020 Census. The population is 64.2% White, 22.9% Multiracial, 9.2% Hispanic, 3.7% Native American/Other, 0.0% Black, and 0.0% Asian. This demographic dot map shows the population of Seneca, with one dot drawn for each person counted by the Census, color-coded by race.

Seneca has become considerably more racially diverse since the 2020 Census. It is considerably more diverse than Oregon overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Seneca, that probability was 14.7% in 2020 and 52.5% in the most recent ACS estimates.

Seneca is ranked the 394th most populous place in Oregon, out of 426 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Seneca was ranked the 369th most populous place in the 2020 Census.

Seneca's White Population

70 residents of Seneca, or 64.2% of the population, identify as White. The share of White residents in Seneca is lower than in Oregon overall, where 71.4% of the population is White. Seneca ranks 13th statewide in terms of White residents as a share of the population, out of 426 places.

Since the 2020 Census, Seneca's White population has declined by an estimated 53.9%. White residents' share of Seneca's population has decreased from 92.1% to 64.2%.

Seneca is less White than neighboring Canyon City (86.8% White), John Day (85.8% White), Mount Vernon (84.3% White), Prairie City (92.5% White), and Burns (91.7% White).

Seneca's Black Population

0 residents of Seneca, or 0.0% of the population, identify as Black. The share of Black residents in Seneca is comparable to the share in Oregon overall, where 1.8% of the population is Black. Seneca ranks 295th statewide in terms of Black residents as a share of the population, out of 426 places.

Since the 2020 Census, Seneca's Black population has grown from 0 to an estimated 0. Black residents' share of Seneca's population has remained roughly unchanged at 0.0%.

Seneca is less Black than neighboring Canyon City (0.3% Black), John Day (0.4% Black), and Burns (0.3% Black).

Seneca's Asian Population

0 residents of Seneca, or 0.0% of the population, identify as Asian. The share of Asian residents in Seneca is slightly lower than in Oregon overall, where 4.4% of the population is Asian. Seneca ranks 353rd statewide in terms of Asian residents as a share of the population, out of 426 places.

Since the 2020 Census, Seneca's Asian population has grown from 0 to an estimated 0. Asian residents' share of Seneca's population has remained roughly unchanged at 0.0%.

Seneca is less Asian than neighboring John Day (3.3% Asian), and Prairie City (0.5% Asian).

Seneca's Hispanic Population

10 residents of Seneca, or 9.2% of the population, identify as Hispanic. The share of Hispanic residents in Seneca is lower than in Oregon overall, where 14.7% of the population is Hispanic. Seneca ranks 417th statewide in terms of Hispanic residents as a share of the population, out of 426 places.

Since the 2020 Census, Seneca's Hispanic population has grown by an estimated 400.0%. Hispanic residents' share of Seneca's population has increased from 1.2% to 9.2%.

Seneca is more Hispanic than neighboring Canyon City (2.2% Hispanic), John Day (1.5% Hispanic), Mount Vernon (0% Hispanic), Prairie City (2.9% Hispanic), and Burns (6% Hispanic).

Seneca's Native American/Other Population

4 residents of Seneca, or 3.7% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Seneca is slightly higher than in Oregon overall, where 1.6% of the population is Native American/Other. Seneca ranks 403rd statewide in terms of Native American/Other residents as a share of the population, out of 426 places.

Since the 2020 Census, Seneca's Native American/Other population has grown from 0 to an estimated 4. Native American/Other residents' share of Seneca's population has increased from 0.0% to 3.7%.

Seneca is more Native American/Other than neighboring Canyon City (2.7% Native American/Other), John Day (0.2% Native American/Other), Prairie City (0% Native American/Other), and Burns (0% Native American/Other). Seneca is less Native American/Other than neighboring Mount Vernon (9.6% Native American/Other).

Seneca's Multiracial Population

25 residents of Seneca, or 22.9% of the population, identify as Multiracial. The share of Multiracial residents in Seneca is significantly higher than in Oregon overall, where 6.1% of the population is Multiracial. Seneca ranks 130th statewide in terms of Multiracial residents as a share of the population, out of 426 places.

Since the 2020 Census, Seneca's Multiracial population has grown by an estimated 127.3%. Multiracial residents' share of Seneca's population has increased from 6.7% to 22.9%.

Seneca is more Multiracial than neighboring Canyon City (8% Multiracial), John Day (8.8% Multiracial), Mount Vernon (6% Multiracial), Prairie City (4.1% Multiracial), and Burns (1.9% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.