CMW may refer to:

• Central Maintenance and Welding, the leading union contractor in FL
• Canadian Music Week, an industry conference and music festival held in Toronto, Canada
• Chicago, Missouri and Western Railway (CM&W), a railway which operated in the midwest United States
• Chien-Ming Wang, baseball pitcher
• Compton's Most Wanted, an American gangsta rap group
• Canadian Manufacturing Week (CMW), a trade show sponsored by the Society of Manufacturing Engineers
• Ignacio Agramonte International Airport, IATA airport code CMW

• Building block (chemistry)
• Building Blocks
• Building Blocks (album)
• Building blocks of Bharat
• Building Blocks of Bharat
• Building Blocks (Tim Kubart album)
• Building BloQs
• Building Centre
• Building code of Canada
• Building collapses
• Building Consent Authorities of New Zealand
• Building control officer
• Building developer
• Building efficiency
• Building Empires Tour
• Building energy efficiency
• Building energy simulation
• Building for a Void
• Building For The Future
• Building Giants
• Building Giants (disambiguation)
• Building Giants (magazine)
• Building Giants (TV series)
• Building information modeling in green building
• Building information modeling software