S61 may refer to: Naval vessels , of the Royal Australian Navy , of the Indian Navy
Rail and transit S61 (Long Island bus) S61 (New York City bus) serving Staten Island S61, a line of the Styria S-Bahn
Other uses Blériot-SPAD S.61, a French fighter aircraft Chopi language County Route S61 (Bergen County, New Jersey) Expressway S61 (Poland) S61: Avoid release to the environment. Refer to special instructions/safety data sheet, a safety phrase Sikorsky S-61, an American helicopter S61, a postcode district in Rotherham, England