HTO

HTO may refer to:

Places

 * HTO Park a beach in Toronto, Ontario, Canada

Transportation

 * East Hampton Airport, in New York, United States
 * Hightown railway station, in England

Science and technology

 * High tibial osteotomy
 * High Temperature Oxide
 * Hohmann transfer orbit
 * Holocene thermal optimum
 * Waco HTO, an American biplane
 * Partially tritiated water

Business

 * Hostile takeover
 * Hellenic Tourist Organisation

Other uses

 * Haupttreuhandstelle Ost, a Nazi state institution in occupied Poland
 * Minica Huitoto, spoken in Colombia and Peru
 * OTE, a Greek telecommunications company