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- Charles Donagh Maginnis
- Harold Van Buren Magonigle
- George W. Maher
- Michael Manfredi
- A. T. Mann
- Marshall and Fox
- Joe Mashburn
- George Mason
- Roy Mason
- Rick Mather
- Walter J. Mathews
- Bernard Maybeck
- Mayers Murray & Phillip
- Thom Mayne
- Wayne McAllister
- John McComb, Jr.
- William McDonough
- Duncan McDuffie
- Samuel McIntire
- Charles Follen McKim
- James W. McLaughlin
- Louis A. McMillen
- William Rutherford Mead
- Milton Bennett Medary
- John Gaw Meem
- Richard Meier
- John William Merrow
- Don Metz
- Ludwig Mies van der Rohe
- James Rupert Miller
- Robert Mills
- Addison Mizner
- Samuel Mockbee
- Roger Montgomery
- Arthur Cotton Moore
- Charles Willard Moore
- Lester S. Moore
- Julia Morgan
- Robert Moses
- Eric Owen Moss
- Michel Mossessian
- Hidalgo Moya
- Robert Murase
- Kenneth MacKenzie Murchison
- Charles Murphy
- Henry Murphy
- Elijah E. Myers
Read more about this topic: List Of United States Architects