HHH
- 3H (disambiguation)
- AI alignment
- H. H. Holmes
- H3 (disambiguation)
- HHHR Tower
- Haela Hunt-Hendrix
- Half Hollow Hills Central School District
- Hans-Hermann Hoppe
- Hash House Harriers
- Haven of Hope Hospital
- Hazem Haj Hassen
- Hilton Head Airport
- Hilton Head Island High School
- Hog Hoggidy Hog
- Holland Heineken House
- Hot Hot Heat
- Hu Hsen-Hsu
- Hubert H. Humphrey
- Hugo's House of Horrors
- Hungry Hungry Hippos
- Hunter Hearst Helmsley
- Hyperornithinemia-hyperammonemia-homocitrullinuria syndrome
- RLL code
- Triple H (disambiguation)