||Fulton Street, Babylon-Farmingdale Road
Western Terminus: Hempstead Turnpike (NY 24) in Farmingdale
Eastern Terminus: Montauk Highway (NY 27A) in Babylon
Distance: 7.08 miles
Counties: Nassau, Suffolk
NY 109 begins at Hempstead Turnpike (NY 24) in Farmingdale as Fulton Street. It runs to the southeast. Upon crossing the Nassau-Suffolk, it changes names to become Babylon-Farmingdale Road. There are grade-separated interchanges with NY 110, the Southern Parkway, and Sunrise Highway (NY 27). It ends at Montauk Highway (NY 27A) in Babylon.