HTO may refer to:
Places edit
- HTO Park a beach in Toronto, Ontario, Canada
Transportation edit
- East Hampton Airport, in New York, United States
- Hightown railway station, in England
Science and technology edit
- High tibial osteotomy
- High Temperature Oxide
- Hohmann transfer orbit
- Holocene thermal optimum
- Waco HTO, an American biplane
- Partially tritiated water
Business edit
Other uses edit
- Haupttreuhandstelle Ost, a Nazi state institution in occupied Poland
- Minica Huitoto, spoken in Colombia and Peru
- OTE, a Greek telecommunications company