Ostrum may refer to:
Östrum, a village in the southern part of Bad Salzdetfurth in Lower Saxony, Germany Ostrum (dragon), a fictional dragon in Dragonaut: The Resonance Peter Ostrum (born 1957), American large animal veterinarian and former child actor Ostrum Asset Management, a France-based asset manager
See also Ostrom (disambiguation) Oestrum (disambiguation) Van Oostrum