Otu

Otu or OTU may refer to:
 * Otu:
 * Otu, Iran, a village in Mazandaran Province, Iran
 * Otu, Siga, Japan
 * Otú Airport, an airport in the village of Otú and serving the town of Remedios, Colombia
 * OTU:
 * Ontario Tech University, a postsecondary institution in Ontario, Canada
 * Operational taxonomic unit, in biology
 * Operational Training Unit (Royal Air Force)
 * Optical channel Transport Unit, a layer of the Optical Transport Network
 * Oxygen toxicity unit, a measure of exposure to a toxic concentration of oxygen in breathing gas.

People with the name

 * Michael Otu (1925–2006), senior commander in the Ghana Air Force