LHH or lhh may refer to:
- Lawyers Have Heart, annual fundraising event for the greater Washington D.C. region affiliate of the American Heart Association
- Lenox Hill Hospital, a hospital in the Upper East Side of Manhattan, New York City
- lhh, the ISO 639-3 code for Laha language (Indonesia), Ambon Island, Indonesia
- LHH, Lee Hecht Harrison (LHH) is a global talent acquisition and job recruitment solutions provider, Jacksonville, Florida