S49 may refer to: County Route S49 (Bergen County, New Jersey) Ikarus S-49, a Yugoslav fighter aircraft Miller Memorial Airpark, in Malheur County, Oregon, United States New Jersey Route 47, partially designated Route S49 until 1953 S49: Keep only in the original container, a safety phrase , a submarine of the United States Navy S49, a postcode district in Chesterfield, England