S43 may refer to:
Submarines
- HMS Unicorn (S43), of the Royal Navy
- INS Vagsheer (S43), of the Indian Navy
- USS S-43 (SS-154), of the United States Navy
Other uses
- County Route 563 (New Jersey), designated New Jersey Route S43 until 1953
- County Route S43 (Bergen County, New Jersey)
- Harvey Airfield, in Snohomish, Washington, United States
- Sikorsky S-43, an American flying boat
- Sulfur-43, an isotope of sulfur
- S43, a postcode district in Chesterfield, England
Topics referred to by the same termThis disambiguation page lists articles associated with the same title formed as a letter–number combination.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: