Outside of Geneseo, NY 39 becomes Avon Road, a name it retains to the outskirts of the village of Avon. As it enters Avon, the farmlands give way to more developed, mostly residential areas. Now named Wadsworth Avenue, NY 39 passes west of a large Kraft Foods plant that occupies a large portion of southwestern Avon. North of the plant, the route heads past residential neighborhoods to the west and commercial establishments situated on the Livonia, Avon and Lakeville Railroad (LAL) to the east. NY 39 ends about from the plant at a junction with US 20 and NY 5 west of the center of Avon and just west of where those two routes cross the LAL at-grade.