Karl can refer to:
- Carl XVI Gustaf - King of Sweden
- Karl XV - King of Sweden-Norway
- Karl XIV Johan - King of Sweden-Norway
- Karl XIII - King of Sweden-Norway
- Karl XII - King of Sweden
- Karl XI - King of Sweden
- Karl X Gustav - King of Sweden
- Karl IX - King of Sweden
- Karl Knutsson Bonde - King of Sweden and Norway
- Karl Sverkersson - King of Sweden
- Charles - english translation of "Karl"
- Karl - the ancestor of the peasants according to Norse mythology
- Karl (comedy prize) - an Austrian comedy prize.