Seneca, PA Demographics

A map of Seneca's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	1,298	990	90.2%	97.9%
Native American/Other	80	6	5.6%	0.6%
Multiracial	35	9	2.4%	0.9%
Asian	15	1	1.0%	0.1%
Black	11	1	0.8%	0.1%
Hispanic	0	4	0.0%	0.4%

Seneca, Pennsylvania has an estimated population of 1,439, a dramatic increase from the 1,011 recorded in the 2020 Census. The population is 90.2% White, 5.6% Native American/Other, 2.4% Multiracial, 1.0% Asian, 0.8% Black, and 0.0% Hispanic. 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 less diverse than Pennsylvania 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 4.1% in 2020 and 18.3% in the most recent ACS estimates.

Seneca is ranked the 810th most populous place in Pennsylvania, out of 2,002 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 985th most populous place in the 2020 Census.

Seneca's White Population

1,298 residents of Seneca, or 90.2% of the population, identify as White. The share of White residents in Seneca is significantly higher than in Pennsylvania overall, where 73% of the population is White. Seneca ranks 70th statewide in terms of White residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Seneca's White population has grown by an estimated 31.1%. White residents' share of Seneca's population has decreased from 97.9% to 90.2%.

Seneca is more White than neighboring Hasson Heights (83% White). Seneca is less White than neighboring Woodland Heights (91.2% White), Oil City (93.5% White), Rouseville (95% White), and Sugarcreek (94.8% White).

Seneca's Black Population

11 residents of Seneca, or 0.8% of the population, identify as Black. The share of Black residents in Seneca is lower than in Pennsylvania overall, where 10.3% of the population is Black. Seneca ranks 1516th statewide in terms of Black residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Seneca's Black population has grown by an estimated 1000.0%. Black residents' share of Seneca's population has increased from 0.1% to 0.8%.

Seneca is more Black than neighboring Oil City (0.7% Black), and Rouseville (0% Black). Seneca is less Black than neighboring Woodland Heights (1.5% Black), Hasson Heights (3.6% Black), and Sugarcreek (0.9% Black).

Seneca's Asian Population

15 residents of Seneca, or 1.0% of the population, identify as Asian. The share of Asian residents in Seneca is slightly lower than in Pennsylvania overall, where 3.8% of the population is Asian. Seneca ranks 1398th statewide in terms of Asian residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Seneca's Asian population has grown by an estimated 1400.0%. Asian residents' share of Seneca's population has increased from 0.1% to 1.0%.

Seneca is more Asian than neighboring Woodland Heights (0% Asian), Oil City (0.9% Asian), Hasson Heights (0.4% Asian), Rouseville (0% Asian), and Sugarcreek (0% Asian).

Seneca's Hispanic Population

0 residents of Seneca, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in Seneca is lower than in Pennsylvania overall, where 8.7% of the population is Hispanic. Seneca ranks 1726th statewide in terms of Hispanic residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Seneca's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of Seneca's population has remained roughly unchanged at 0.0%.

Seneca is less Hispanic than neighboring Oil City (1.4% Hispanic), Hasson Heights (0.5% Hispanic), and Sugarcreek (1.4% Hispanic).

Seneca's Native American/Other Population

80 residents of Seneca, or 5.6% 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 Pennsylvania overall, where 0.6% of the population is Native American/Other. Seneca ranks 526th statewide in terms of Native American/Other residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Seneca's Native American/Other population has grown by an estimated 1233.3%. Native American/Other residents' share of Seneca's population has increased from 0.6% to 5.6%.

Seneca is more Native American/Other than neighboring Woodland Heights (0% Native American/Other), Oil City (0.1% Native American/Other), Hasson Heights (0.5% Native American/Other), Rouseville (1.5% Native American/Other), and Sugarcreek (0.9% Native American/Other).

Seneca's Multiracial Population

35 residents of Seneca, or 2.4% of the population, identify as Multiracial. The share of Multiracial residents in Seneca is comparable to the share in Pennsylvania overall, where 3.6% of the population is Multiracial. Seneca ranks 1798th statewide in terms of Multiracial residents as a share of the population, out of 2,002 places.

Since the 2020 Census, Seneca's Multiracial population has grown by an estimated 288.9%. Multiracial residents' share of Seneca's population has increased from 0.9% to 2.4%.

Seneca is more Multiracial than neighboring Sugarcreek (2% Multiracial). Seneca is less Multiracial than neighboring Woodland Heights (7.3% Multiracial), Oil City (3.4% Multiracial), Hasson Heights (11.8% Multiracial), and Rouseville (3.5% 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.