Forest Hills is an unincorporated community in Kent County in the U.S. state of Michigan. It is a census-designated place (CDP) for statistical purposes. The population was 25,867 at the 2010 census, up from 20,942 at the 2000 census.
Forest Hills is in central Kent County, about 10 miles (16 km) east of the center of Grand Rapids. It comprises most of Ada Township, including the unincorporated community of Ada, with a ZIP Code of 49301. The CDP extends south to comprise half of Cascade Township, including part of ZIP Code 49546, with a mailing address of Grand Rapids.
M-21, a state highway, crosses Forest Hills, passing through Ada, and leading west toward Grand Rapids and east 22 miles (35 km) to Ionia. Interstate 96 runs just to the south of the Forest Hills CDP, leading west to Grand Rapids and east 55 miles (89 km) to Lansing. Gerald R. Ford International Airport is just outside the CDP limits, on the southwest side of I-96.
According to the United States Census Bureau, the CDP has a total area of 50.8 square miles (131.6 km), of which 49.3 square miles (127.6 km) are land and 1.5 square miles (4.0 km), or 3.01%, are water. The Grand River crosses the community from the east side to the northwest corner.
As of the census of 2000, there were 20,942 people, 7,105 households, and 6,046 families residing in the community. The population density was 424.0 per square mile (163.7/km²). There were 7,371 housing units at an average density of 149.3 per square mile (57.6/km²). The racial makeup of the community was 95.28% White, 0.64% African American, 0.20% Native American, 2.63% Asian, 0.34% from other races, and 0.91% from two or more races. Hispanic or Latino of any race were 0.95% of the population.
There were 7,105 households out of which 44.2% had children under the age of 18 living with them, 78.6% were married couples living together, 4.8% had a female householder with no husband present, and 14.9% were non-families. 12.7% of all households were made up of individuals and 4.9% had someone living alone who was 65 years of age or older. The average household size was 2.94 and the average family size was 3.23.
In the community, the population was spread out with 31.4% under the age of 18, 4.9% from 18 to 24, 25.6% from 25 to 44, 29.4% from 45 to 64, and 8.8% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 99.3 males. For every 100 females age 18 and over, there were 96.1 males.
The median income for a household in the community was $96,150 (2007 estimate), and the median income for a family was $106,521. Males had a median income of $68,003 versus $37,553 for females. The per capita income for the community was $39,517. About 1.3% of families and 2.0% of the population were below the poverty line, including 1.7% of those under age 18 and 3.9% of those age 65 or over.
The median house value was $212,600 (year 2000).