JCM may refer to: People James Clerk Maxwell (1831–1879), Scottish physicist John Cougar Mellencamp (born 1951), American singer John Cameron Mitchell (born 1963), American actor, playwright, and singer
Science and technology Japan Collection of Microorganisms Jaynes-Cummings model Journal of Clinical Microbiology Journal of Communications AGM-169 Joint Common Missile JunoCam, a camera on a planned space probe to the planet Jupiter
Other uses Jewish Children's Museum Jackson Central-Merry High School, a public high school in Jackson, Tennessee Joint Council of Municipalities Joint Crediting Mechanism, bilateral financing by Japanese government