CM or cm may stand for:

• Cameroon (ISO country code)
• center of mass
• centimetre (cm)
• circular mil - a USA unit for the cross-sectional area of electrical wires (always CM, in capitals)
• Common metre
• Chief Minister of a state in some countries
• Member of the Order of Canada
• the IATA code for Copa Airlines
• Computer Modern - the standard font set that ships with the TeX computer typesetting system
• Configuration management
• Content management
• Commercial model
• Championship Manager - an association football computer game
• The Class Menagerie, a web comic