Seneca, MO Demographics

A map of Seneca's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	1,427	1,780	74.9%	79.8%
Native American/Other	266	148	14.0%	6.6%
Multiracial	118	197	6.2%	8.8%
Hispanic	92	84	4.8%	3.8%
Asian	3	14	0.2%	0.6%
Black	0	7	0.0%	0.3%

Seneca, Missouri has an estimated population of 1,906, a large decrease from the 2,230 recorded in the 2020 Census. The population is 74.9% White, 14.0% Native American/Other, 6.2% Multiracial, 4.8% Hispanic, 0.2% Asian, and 0.0% Black. 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 more diverse than Missouri 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 34.9% in 2020 and 41.4% in the most recent ACS estimates.

Seneca is ranked the 279th most populous place in Missouri, out of 1,082 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 239th most populous place in the 2020 Census.

Seneca's White Population

1,427 residents of Seneca, or 74.9% of the population, identify as White. The share of White residents in Seneca is comparable to the share in Missouri overall, where 76.3% of the population is White. Seneca ranks 892nd statewide in terms of White residents as a share of the population, out of 1,082 places.

Since the 2020 Census, Seneca's White population has declined by an estimated 19.8%. White residents' share of Seneca's population has decreased from 79.8% to 74.9%.

Seneca is more White than neighboring Peoria (60.7% White), Wyandotte (53.8% White), and Quapaw (55.8% White). Seneca is less White than neighboring Loma Linda (84% White), and Redings Mill (96.3% 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 considerably lower than in Missouri overall, where 10.9% of the population is Black. Seneca ranks 645th statewide in terms of Black residents as a share of the population, out of 1,082 places.

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

Seneca is less Black than neighboring Loma Linda (6.1% Black).

Seneca's Asian Population

3 residents of Seneca, or 0.2% of the population, identify as Asian. The share of Asian residents in Seneca is comparable to the share in Missouri overall, where 2.1% of the population is Asian. Seneca ranks 307th statewide in terms of Asian residents as a share of the population, out of 1,082 places.

Since the 2020 Census, Seneca's Asian population has declined by an estimated 78.6%. Asian residents' share of Seneca's population has remained roughly unchanged at 0.2%.

Seneca is more Asian than neighboring Redings Mill (0% Asian). Seneca is less Asian than neighboring Peoria (1.9% Asian), Wyandotte (2.6% Asian), Loma Linda (0.3% Asian), and Quapaw (1% Asian).

Seneca's Hispanic Population

92 residents of Seneca, or 4.8% of the population, identify as Hispanic. The share of Hispanic residents in Seneca is comparable to the share in Missouri overall, where 5.2% of the population is Hispanic. Seneca ranks 271st statewide in terms of Hispanic residents as a share of the population, out of 1,082 places.

Since the 2020 Census, Seneca's Hispanic population has grown by an estimated 9.5%. Hispanic residents' share of Seneca's population has increased from 3.8% to 4.8%.

Seneca is more Hispanic than neighboring Peoria (0% Hispanic), Loma Linda (1.6% Hispanic), Redings Mill (0% Hispanic), and Quapaw (3.2% Hispanic). Seneca is less Hispanic than neighboring Wyandotte (6.5% Hispanic).

Seneca's Native American/Other Population

266 residents of Seneca, or 14.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Seneca is considerably higher than in Missouri overall, where 0.7% of the population is Native American/Other. Seneca ranks 12th statewide in terms of Native American/Other residents as a share of the population, out of 1,082 places.

Since the 2020 Census, Seneca's Native American/Other population has grown by an estimated 79.7%. Native American/Other residents' share of Seneca's population has increased from 6.6% to 14.0%.

Seneca is more Native American/Other than neighboring Loma Linda (2.7% Native American/Other), and Redings Mill (1.9% Native American/Other). Seneca is less Native American/Other than neighboring Peoria (21.5% Native American/Other), Wyandotte (25.6% Native American/Other), and Quapaw (32.7% Native American/Other).

Seneca's Multiracial Population

118 residents of Seneca, or 6.2% of the population, identify as Multiracial. The share of Multiracial residents in Seneca is comparable to the share in Missouri overall, where 4.8% of the population is Multiracial. Seneca ranks 89th statewide in terms of Multiracial residents as a share of the population, out of 1,082 places.

Since the 2020 Census, Seneca's Multiracial population has declined by an estimated 40.1%. Multiracial residents' share of Seneca's population has decreased from 8.8% to 6.2%.

Seneca is more Multiracial than neighboring Loma Linda (5.3% Multiracial), and Redings Mill (1.9% Multiracial). Seneca is less Multiracial than neighboring Peoria (15.9% Multiracial), Wyandotte (11.6% Multiracial), and Quapaw (7.4% 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.