The surname Krag may refer to:
- Astrid Krag Danish politician
- Christian Emil Krag-Juel-Vind-Frijs (1817 - 1896) Danish politician and nobleman
- Claus Krag Norwegian professor of history
- Dorothea Krag (1675 -1754) Danish noblewoman
- Erik Krag (1902 - 1987) Norwegian writer
- Ernst Krag, Waffen SS soldier
- Frederik Krag (1655 - 1628) Danish ambassador
- Hans Krag (disambiguation)
- Jens Otto Krag, Danish politician
- Lul Krag (1878 -1956) Norwegian painter
- Nils Krag (1863 - 1926) Norwegian industrialist and inventor
- Ole Herman Johannes Krag, (1837 - 1916) Norwegian firearms designer
- Peter Rasmus Krag (1825 - 1891) Norwegian army engineer and politician
- Rasmus Krag (1680 - 1755) Danish admiral
- Rasmus Krag (1763 - 1838) Danish military officer and engineer
- Sophia Magdalena Krag Juel Vind (1734–1810) Danish noblewoman and landowner
- Thomas Krag (1868 - 1913) Norwegian writer
- Vilhelm Krag (1871 -1933) Norwegian poet