Look up nimh in Wiktionary, the free dictionary.
NIMH may refer to:
- Nickel–metal hydride battery (NiMH), a type of electrical battery
- National Institute of Mental Health, an agency of the United States government
- National Institute of Medical Herbalists, a professional organisation in the United Kingdom
- Rats of NIMH, a series of children's books
- The Secret of NIMH, a 1982 animated film
- The Secret of NIMH 2: Timmy to the Rescue, a 1998 direct-to-video animated film