Serving Suffolk County, NY

Maryhaven's administration building is located in Port Jefferson Station, NY.

There are currently 28 group homes located in towns throughout central and eastern Suffolk County with apartment program in Port Jefferson Station.

Day Habilitation programs are located in Port Jefferson Station, Medford, Holbrook, Yaphank, and Patchogue.

The Integrated Business Center can be found in Yaphank, NY.