Ketterer is a surname, and may refer to:
- Emil Ketterer (1883–1959), German track and field athlete
- Eugène Ketterer (1831–1870), French composer and pianist
- Franz Ketterer (1676–1749), German clockmaker
- Markus Ketterer (born 1967), Finnish ice hockey player
- Reinhard E. Ketterer (born 1948), German figure skater
- Sepp Ketterer (1899–1991), German Austrian cinematographer
- Theodor Ketterer (1815–1884), German clockmaker
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