NIMH

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