Seneca, IL Demographics

A map of Seneca's Population by Race

Seneca, Illinois had a population of 2,353 in 2020. It was 90.0% White, 0.7% Black, 0.5% Asian, 4.4% Hispanic, 0.5% Native American/Other, and 3.9% Multiracial. This map presents the population of Seneca, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Of the 1,466 places in Illinois, Seneca is the 472nd most populous. 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's White Population

2,118 residents of Seneca identify as White, or 90.0%. This makes the White share of the population of Seneca considerably larger than the White share of the population of Illinois (58.3% White). Of the 1,466 places in Illinois, Seneca is ranked #778 in terms of White residents as a share of the population.

Seneca is more White than neighboring Marseilles (85.7% White), Verona (77.9% White), and Morris (79.5% White). Seneca is less White than neighboring Kinsman (93.3% White), and Ransom (90.3% White).

Seneca's Black Population

17 residents of Seneca identify as Black, or 0.7%. This makes the Black share of the population of Seneca less than the Black share of the population of Illinois (13.9% Black). Of the 1,466 places in Illinois, Seneca is ranked #697 in terms of Black residents as a share of the population.

Seneca is more Black than neighboring Verona (0% Black). Seneca is less Black than neighboring Marseilles (0.8% Black), Kinsman (1.1% Black), Morris (2.1% Black), and Ransom (1.3% Black).

Seneca's Asian Population

11 residents of Seneca identify as Asian, or 0.5%. This makes the Asian share of the population of Seneca slightly less than the Asian share of the population of Illinois (5.8% Asian). Of the 1,466 places in Illinois, Seneca is ranked #590 in terms of Asian residents as a share of the population.

Seneca is more Asian than neighboring Kinsman (0% Asian). Seneca is less Asian than neighboring Verona (1.4% Asian), Morris (1.2% Asian), and Ransom (0.6% Asian).

Seneca's Hispanic Population

103 residents of Seneca identify as Hispanic, or 4.4%. This makes the Hispanic share of the population of Seneca less than the Hispanic share of the population of Illinois (18.2% Hispanic). Of the 1,466 places in Illinois, Seneca is ranked #554 in terms of Hispanic residents as a share of the population.

Seneca is less Hispanic than neighboring Marseilles (7.2% Hispanic), Verona (16.3% Hispanic), Morris (13.3% Hispanic), and Ransom (5.8% Hispanic).

Seneca's Native American/Other Population

12 residents of Seneca identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.5%. This makes the Native American/Other share of the population of Seneca roughly similar to the Native American/Other share of the population of Illinois (0.5% Native American/Other). Of the 1,466 places in Illinois, Seneca is ranked #443 in terms of Native American/Other residents as a share of the population.

Seneca is more Native American/Other than neighboring Kinsman (0% Native American/Other), Morris (0.4% Native American/Other), and Ransom (0% Native American/Other). Seneca is less Native American/Other than neighboring Marseilles (0.6% Native American/Other).

Seneca's Multiracial Population

92 residents of Seneca identify as Multiracial, or 3.9%. This makes the Multiracial share of the population of Seneca roughly similar to the Multiracial share of the population of Illinois (3.2% Multiracial). Of the 1,466 places in Illinois, Seneca is ranked #552 in terms of Multiracial residents as a share of the population.

Seneca is more Multiracial than neighboring Kinsman (1.1% Multiracial), Verona (3.8% Multiracial), Morris (3.5% Multiracial), and Ransom (1.9% Multiracial). Seneca is less Multiracial than neighboring Marseilles (5.3% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.