Humboldt Hill first appeared as a
census designated place in the
1990 U.S. census. The census reported that 94.2% of the population lived in households, 4.3% lived in non-institutionalized group quarters, and 1.5% were institutionalized. 93.2% of residents lived in urban areas, while 6.8% lived in rural areas. There were 1,367 households, out of which 26.8% included children under the age of 18, 45.7% were married-couple households, 9.5% were
cohabiting couple households, 26.4% had a female householder with no partner present, and 18.4% had a male householder with no partner present. 27.6% of households were one person, and 13.9% were one person aged 65 or older. The average household size was 2.41.
2010 census The
2010 United States census reported that Humboldt Hill had a population of 3,414. The population density was . The racial makeup of Humboldt Hill was 2,853 (83.6%)
White, 41 (1.2%)
African American, 119 (3.5%)
Native American, 102 (3.0%)
Asian, 2 (0.1%)
Pacific Islander, 129 (3.8%) from
other races, and 168 (4.9%) from two or more races.
Hispanic or
Latino of any race were 298 persons (8.7%). The Census reported that 3,187 people (93.4% of the population) lived in households, 145 (4.2%) lived in non-institutionalized group quarters, and 82 (2.4%) were institutionalized. There were 1,325 households, out of which 360 (27.2%) had children under the age of 18 living in them, 653 (49.3%) were
opposite-sex married couples living together, 143 (10.8%) had a female householder with no husband present, 66 (5.0%) had a male householder with no wife present. There were 112 (8.5%)
unmarried opposite-sex partnerships, and 17 (1.3%)
same-sex married couples or partnerships. 326 households (24.6%) were made up of individuals, and 151 (11.4%) had someone living alone who was 65 years of age or older. The average household size was 2.41. There were 862
families (65.1% of all households); the average family size was 2.87. The population age distribution is 646 people (18.9%) under the age of 18, 374 people (11.0%) aged 18 to 24, 773 people (22.6%) aged 25 to 44, 1,024 people (30.0%) aged 45 to 64, and 597 people (17.5%) who were 65 years of age or older. The median age was 42.2 years. For every 100 females, there were 94.6 males. For every 100 females age 18 and over, there were 95.1 males. There were 1,396 housing units at an average density of , of which 1,325 were occupied, of which 1,016 (76.7%) were owner-occupied, and 309 (23.3%) were occupied by renters. The homeowner vacancy rate was 1.4%; the rental vacancy rate was 3.4%. 2,434 people (71.3% of the population) lived in owner-occupied housing units and 753 people (22.1%) lived in rental housing units. ==Politics==