Jysk is the Danish word for Jutlandic or Jutish:

• Jutland, the western peninsula of Denmark
• Jutlandic or Jutish, its dialect
• Jutes, a historic Germanic tribe migrating from Jutland to England

Jysk in company names may refer to:

• JYSK, a Danish household goods retail chain
• Jysk Supermarket, later Danish Supermarket, part of Salling Group
• JYSK Arena, a complex of indoor sports arenas in Silkeborg, Denmark
• JYSK Park, a football stadium in Silkeborg, Denmark
• Jyske Bank, a Danish bank