Eucalyptus Hills is a census-designated place in the East County region of San Diego County, California. Eucalyptus Hills sits at an elevation of . The 2020 United States census reported Eucalyptus Hills's population as 5,517, up from 5,313 in the 2010 census.
According to the United States Census Bureau, the CDP covers an area of 4.8 square miles (12.4 km), 99.69% of it land and 0.31% of it water.
Eucalyptus Hills first appeared as a census designated place in the 2010 U.S. census.
The 2020 United States census reported that Eucalyptus Hills had a population of 5,517. The population density was . The racial makeup of Eucalyptus Hills was 73.0% White, 5.7% African American, 0.7% Native American, 1.7% Asian, 0.1% Pacific Islander, 5.3% from other races, and 13.5% from two or more races. Hispanic or Latino of any race were 17.6% of the population.
The whole population lived in households. There were 1,836 households, out of which 36.1% included children under the age of 18, 62.1% were married-couple households, 3.6% were cohabiting couple households, 18.6% had a female householder with no partner present, and 15.6% had a male householder with no partner present. 16.2% of households were one person, and 9.7% were one person aged 65 or older. The average household size was 3.00. There were 1,468 families (80.0% of all households).
The age distribution was 24.3% under the age of 18, 6.9% aged 18 to 24, 24.2% aged 25 to 44, 25.8% aged 45 to 64, and 18.8% who were 65years of age or older. The median age was 40.0years. For every 100 females, there were 104.9 males.
There were 1,879 housing units at an average density of , of which 1,836 (97.7%) were occupied. Of these, 72.8% were owner-occupied, and 27.2% were occupied by renters.