NHH may refer to:
- North Hill House School, an independent specialist school in Frome, Somerset, United Kingdom
- Norwegian School of Economics
- NHH-Symposium, a business conference in Bergen, Norway
- Non-ketotic hyperglycemic hemichorea, a brain disorder
- Non half-hourly, a class of commercial electricity metering in the UK
- Niehai Hua, a Chinese novel
- North Hampshire Hospital, a hospital located in Basingstoke, Hampshire, UK.