2020 census As of the
2020 census, the county had a population of 131,144. The median age was 36.8 years. 21.8% of residents were under the age of 18 and 17.7% of residents were 65 years of age or older. For every 100 females there were 95.7 males, and for every 100 females age 18 and over there were 93.6 males age 18 and over. 94.55% of the population reported being of one race. The racial makeup of the county was 78.4%
White, 10.4%
Black or African American, 0.3%
American Indian and Alaska Native, 2.6%
Asian, 0.7%
Native Hawaiian and
Pacific Islander, 2.1% from some other race, and 5.4% from
two or more races.
Hispanic or Latino residents of any race comprised 4.9% of the population. 87.0% of residents lived in urban areas, while 13.0% lived in rural areas. for Black Hawk County from
ACS 5-year estimates
2000 census At the
2000 census there were 128,012 people, 49,683 households, and 31,946 families in the county. The population density was . There were 51,759 housing units at an average density of . The
racial makeup of the county was 88.42%
White, 7.95%
Black or
African American, 0.18%
Native American, 0.98%
Asian, 0.04%
Pacific Islander, 0.93% from other races, and 1.49% from two or more races. 1.84%. were
Hispanic or
Latino of any race. Of the 49,683 households 29.50% had children under the age of 18 living with them, 50.20% were married couples living together, 10.80% had a female householder with no husband present, and 35.70% were non-families. 27.10% of households were one person and 10.90% were one person aged 65 or older. The average household size was 2.45 and the average family size was 2.97. Age spread: 23.10% under the age of 18, 15.70% from 18 to 24, 25.20% from 25 to 44, 22.00% from 45 to 64, and 14.00% 65 or older. The median age was 34 years. For every 100 females, there were 92.30 males. For every 100 females age 18 and over, there were 88.80 males. The median household income was $37,266 and the median family income was $47,398. Males had a median income of $33,138 versus $23,394 for females. The per capita income for the county was $18,885. About 7.90% of families and 13.10% of the population were below the
poverty line, including 14.40% of those under age 18 and 8.90% of those age 65 or over. ==Communities==