HMI may refer to:
Companies and organizations Hahn-Meitner-Institut, now Helmholtz-Zentrum Berlin, a German research institute Hanson Musical Instruments, a manufacturer of electric guitars Hartz Mountain Industries, an American holding company HD Mining International, a mining company in Vancouver, British Columbia, Canada Hetrick-Martin Institute, an LGBT youth organization in New York City High Mountain Institute, in Leadville, Colorado, United States Himalayan Mountaineering Institute, in Darjeeling, India HMI Hotel Group, a hotel management company in Japan Holistic Management International, an American non-profit organization HornAfrik Media Inc, a media organization based in Mogadishu, Somalia Hotel Meliá, Inc., in Ponce, Puerto Rico Houston Mechatronics, Inc, see Houston Mechatronics, Inc Hualien Media International, a global entertainment company in Taipei, Taiwan Muslim Students' Association (Indonesia)
Technology Helioseismic and Magnetic Imager, on the Solar Dynamics Observatory spacecraft hexamethyleneimine, an organic compound Human–machine interaction Human–machine interface Hydrargyrum medium-arc iodide lamp, used for stage lighting
Other uses Hami Airport, in Xinjiang, China Hammond-Whiting station, in Indiana Her Majesty's Inspectorate of Education, in Scotland Northern Huishui Miao language, spoken in China