U.S. Federal Route 20 runs across the northern portion of Chautauqua County. It runs from the Pennsyalvania State Line, near State Line to the Chautauqua/Erie County Line. U.S. Rt. 20 passes through the following towns in Chautauqua County. Ripley Westfield Fredonia Silver Creek Hanover U.S. Rt. 20 is multi-plexed in Chautauqua County. New York State Route 5, from Silver Creek to the Chautauqua/Erie County Line. U.S. Rt. 20 intersects the following highways in Chautauqua County. New York State Route 76, at Ripley. New York State Route 394, at Westfield. New York State Route 60, at Fredonia. New York State Route 39, at Fredonia. New York State Route 5, at Silver Creek. Interstate 90, (New York State Thruway), at Hanover.
