SK-1

SK-1 or SK1 may refer to:

• Casio SK-1, a small sampling keyboard
• Garant 30k SK-1, an East German armored vehicle
• Hammond SK1, a modern keyboard
• SK-1 spacesuit, an early Russian spacesuit
• sK1 (program), a fork of the Skencil vector graphics editor
• Sphingosine kinase 1, a protein
• SK1 (film), a 2014 French film
• VR Class Sk1, a locomotive class
• SK₁, the special Whitehead group