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.