Demographics in Seneca, IL

Population, age, race, ethnicity, and household statistics — 2023 ACS Data

Where is Seneca?

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Population

Source: U.S. Census Bureau ACS (2023)

Total Population

2,525

Male

1,340

53.1%

Female

1,185

46.9%

Median Age

35.2

Age Distribution

Source: U.S. Census Bureau ACS (2023)

Race & Ethnicity

Source: U.S. Census Bureau ACS (2023)

White

89.9%

Black

1.1%

Hispanic

6.0%

Two or More

7.0%

Other

2.0%

Education & Household

Source: U.S. Census Bureau ACS (2023)

Bachelor's or Higher

8.4%

High School or Higher

35.0%

Foreign Born

1.9%

Veterans

8.0%

Married

40.1%

Avg Household Size

2.7

Marital Status by Age

Source: U.S. Census Bureau ACS (2023)

Seneca, IL has a population of 2,525 with a median age of 35.2. The racial makeup is 89.9% White, 6.0% Hispanic, 1.1% Black. About 8.4% of residents hold a bachelor's degree or higher. The foreign-born population is 1.9%.