Karl Groos (disambiguation)
Karl Groos is the name of the following people:
- Karl Groos (1861–1946), German philosopher and psychologist
- Karl Groos (publisher) († 1839), German publisher in Heidelberg
- Karl August Groos (1789–1861), Protestant clergyman, editor and composer
- Karl Henrich Groos (1771–1858), German administrative officer and head of the rent chamber in the county of Sayn-Wittgenstein-Hohenstein