Mercer Lake Habitat Area is a 56-acre peninsula extending into the southern shore of Mercer Lake in Oneida County. It includes a large amount of shore frontage, fringed with older age pine. This property consists of a mix of upland and lowland habitats found throughout the site. Upland cover-types vary between Northern hardwoods and stands of pine and aspen. Lowlands include sedge, bogs and swamp conifer.

The department acquired the property in 1970 to protect fish spawning along Mercer Lake shoreline and to provide opportunities for public recreation. Bosacki Road, a town road through the property, was approved/permitted in 1979 and constructed in 1986.