MLM or mlm may refer to:

• Multi-level marketing
• The NYSE stock symbol of Martin Marietta Materials
• Military liaison missions of the victors of World War II
• Missouri Lumber and Mining Company

• Medical logic module, of a healthcare knowledge base
• Millilumen (mlm), a unit of luminous flux
• Multi-layer mask, in multi-project wafer service in semiconductor fabrication
• Multipurpose Laboratory Module or Nauka, a Russian module of the International Space Station.

• Morelia International Airport's IATA airport code
• Millom railway station, England (station code)

• Marxism–Leninism–Maoism, a communist political philosophy
• Man loving men (MLM)