HS3 or HS-3 may refer to:

Transport

* Curtiss HS-3, a patrol flying boat built for the United States Navy during World War I * Helicopter Antisubmarine Squadron 3, a United States Navy unit renamed to HSC-9 in 2009 (Helicopter Sea Combat Squadron 9) * High Speed 3: a proposal to improve rail links in northern England now called

Northern Powerhouse Rail Northern Powerhouse Rail (NPR), sometimes referred to unofficially as High Speed 3, is a proposed major rail programme designed to substantially enhance the economic potential of the North of England. The phrase was adopted in 2014 for a project ...

Other uses

* HS3, a part of the British HS postcode area * 2008 HS3, an asteroid {{Letter-NumberCombDisambig