The 7th Suffolk County Legislative District (L.D.) includes Patchogue, East Patchogue, North Patchogue, Medford and Gordon Heights. Smaller portions of Blue Point, North Bellport, Middle Island, Coram and Fire Island are also included in the District. The District runs north to Middle Country Road and includes the southern shoreline within the following rough boundaries: Blue Point Avenuenuenuenue to the west and the Bellport Village line to the east.
The 51 election districts and 45,855 registered voters in the 7th L.D. are located within the Town of Brookhaven.