[2] Eucalyptus Hills sits at an elevation of 627 feet (191 m).

According to the United States Census Bureau, the CDP covers an area of 4.8 square miles (12.4 km2), 99.69% of it land and 0.31% of it water.

The population density was 1,112.9 inhabitants per square mile (429.7/km2).

The racial makeup of Eucalyptus Hills was 4,566 (85.9%) White, 195 (3.7%) African American, 58 (1.1%) Native American, 87 (1.6%) Asian, 6 (0.1%) Pacific Islander, 187 (3.5%) from other races, and 214 (4.0%) from two or more races.

3,668 people (69.0% of the population) lived in owner-occupied housing units and 1,629 people (30.7%) lived in rental housing units.