Krieg in German means war. It is also a surname, and may refer to:
- Bill Krieg (1859–1930), American professional baseball player
- Dave Krieg (b. 1958), American professional football player
- Lothar Krieg (b. 1955), German Olympic track and field athlete
- Nathalie Krieg (contemporary), Swiss figure skater
- Peter Krieg (b. 1947), German documentary film maker
- Susan Krieg (b. 1952), American painter and muralist
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