2020 census As of the
2020 census, Eureka had a population of 2,332, with 1,038 households and 568 families. The population density was 1,018.3 per square mile (393.2/km). There were 1,283 housing units at an average density of 560.3 per square mile (216.3/km). The median age was 44.9 years. 22.1% of residents were under the age of 18, 6.1% were from ages 18 to 24, 21.9% were from ages 25 to 44, 25.0% were from ages 45 to 64, and 24.8% were 65 years of age or older. For every 100 females, there were 94.5 males, and for every 100 females age 18 and over, there were 90.6 males age 18 and over. Of the city's households, 24.6% had children under the age of 18 living in them. Of all households, 38.6% were married-couple households, 22.7% were households with a male householder and no spouse or partner present, and 30.7% were households with a female householder and no spouse or partner present. About 39.4% of all households were made up of individuals and 18.1% had someone living alone who was 65 years of age or older.
Demographic estimates The average household size was 2.1 and the average family size was 2.9. The percent of those with a bachelor's degree or higher was estimated to be 10.3% of the population.
Income and poverty The 2016–2020 5-year
American Community Survey estimates show that the median household income was $34,329 (with a margin of error of +/- $3,763) and the median family income was $45,563 (+/- $10,274). Males had a median income of $35,094 (+/- $8,495) versus $18,611 (+/- $5,359) for females. The median income for those above 16 years old was $26,750 (+/- $5,971). Approximately, 15.4% of families and 21.0% of the population were below the
poverty line, including 22.3% of those under the age of 18 and 16.4% of those ages 65 or over.
2010 census As of the census of 2010, there were 2,633 people, 1,171 households, and 663 families living in the city. The population density was . There were 1,410 housing units at an average density of . The racial makeup of the city was 95.2%
White, 0.2%
African American, 0.9%
Native American, 0.4%
Asian, 1.1% from
other races, and 2.2% from
two or more races.
Hispanic or
Latino of any race were 5.3% of the population. There were 1,171 households, of which 27.2% had children under the age of 18 living with them, 41.0% were married couples living together, 10.4% had a female householder with no husband present, 5.2% had a male householder with no wife present, and 43.4% were non-families. 39.3% of all households were made up of individuals, and 18.8% had someone living alone who was 65 years of age or older. The average household size was 2.17 and the average family size was 2.86. The median age in the city was 43.2 years. 23.7% of residents were under the age of 18; 6.9% were between the ages of 18 and 24; 21.5% were from 25 to 44; 25.5% were from 45 to 64; and 22.3% were 65 years of age or older. The gender makeup of the city was 47.9% male and 52.1% female. ==Education==