S43 may refer to:

Submarines

* , of the Royal Navy * , of the Indian Navy * , of the United States Navy

Other uses

County Route 563 (New Jersey) County Route 563 (CR 563) is a county highway in the U.S. state of New Jersey. The highway extends from CR 629 (Ventnor Avenue) in Margate City, Atlantic County north to Route 72 in Woodland Township, Burlington County. In Atlantic County, th ...

, designated New Jersey Route S43 until 1953 * County Route S43 (Bergen County, New Jersey) *

Harvey Airfield Harvey Airfield, also known as Harvey Field , is a privately owned, public-use airport in Snohomish, Washington. The airfield has one asphalt runway, one turf runway, and fourteen hangar bays. It covers an area of approximately . It is home t ...

, in Snohomish, Washington, United States *

Sikorsky S-43 The Sikorsky S-43 (sometimes referred to as the Baby Clipper) was a 1930s American twin-engine amphibious flying boat monoplane produced by Sikorsky Aircraft. Design and development The S-43 first flew in 1935, and was a smaller version of the ...

, an American flying boat * Sulfur-43, an isotope of sulfur * S43, a postcode district in Chesterfield, England {{Letter-NumberCombDisambig