HV or Hv may stand for:
- Mitochondrial DNA Haplogroup HV
- Burkina Faso, WMO country code (from the former French name, "Haute Volta")
- Heimevernet, the Norwegian home guard
- Hemvärnet, the Swedish home guard.
- High voltage (electricity)
- Holcomb Valley Scout Ranch
- Home video
- Hrvatska Vojska, the Croatian army
- Hudson Valley
- Hwair (ƕ), a Gothic letter, called hv in Unicode
- Hybrid vehicles
- Transavia, IATA airline code
- Vickers Hardness, a hardness test.
- Humanae Vitae, a papal encyclical.