Allendale is a census-designated place located in Ottawa County within the state of Michigan. As of the 2020 census, the area had a population of 27,073 residents.
The community is situated within Allendale Charter Township, specifically occupying the northern two-thirds of the township. Its boundaries are defined by Pierce Street to the east, 75th Avenue to the south, and Lake Michigan Drive (M-45) to the west. It functions as an exurb of Grand Rapids due to its proximity to major commuter routes leading into the city.
Geographically and economically, Allendale is part of the Grand Rapids-Muskegon-Holland, Michigan combined statistical area. Its location provides a residential connection to the surrounding metropolitan region while maintaining its distinct identity within Ottawa County.