Haplogroup K may refer to:

• Haplogroup K (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
• Haplogroup K (Y-DNA), a human Y-chromosome (Y-DNA) haplogroup

• The English Baroque Soloists
• The english civil war
• The English Collective of Prostitutes
• The english congregation
• The English Congregation
• The English Constitution
• The English cricket season of 1904
• The English Dialect Dictionary
• The English Flower Garden
• The English Historical Review
• The English Lake District
• The English Langauge
• The English Language
• The Englishman's Boy
• The Englishman Who Went Up a Hill But Came Down a Mountain (1995)
• The English Mechanic and World of Science
• The English Moor
• The English Opera
• The English Opera House
• The English Panther (album)
• The english patient (film)
• The English Patient (novel)
• The English Patient (Seinfeld)
• The English Patient (soundtrack)
• The English Reformation