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| Chem Madoz | Surrealism |
| David Maisel | Aerial |
| Jay Maisel | Editorial |
| Man Ray (Emanuel Radnitzsky, 1890-1976) | Surrealism |
| Robert Mapplethorpe | Portraits, nudes, flowers |
| Lazhar Mansouri | Algerian portrait photographer |
| Sally Mann | Children, landscapes, death |
| Étienne Jules Marey | Classic |
| Mary Ellen Mark | Photo essays |
| Polli Marriner | Chemigrams |
| William H. Martin (1865-1940) | Tall-tale post cards |
| Leo Matiz (1865-1940) | Colombia |
| Don McCullin | Viet Nam & other wars, landscapes |
| Steve McCurry | That picture of the Afghan woman |
| Judith K. McMillan | X-ray |
| Ralph Eugene Meatyard | Family, surrealism |
| Susan Meiselas | Photojournalism |
| Eric Meola | Portraits, landscapes, Bruce Springsteen's Born to Run |
| Tony Mendoza | Ernie |
| Jeff Mermelstein | Street |
| Roger Mertin | Diverse |
| Ray Metzker | Chicago |
| Sheila Metzner | Fresson color printing process |
| Joel Meyerowitz | Cape Cod, redheads, World Trade Center |
| Joan Meyers | Nudes |
| Steven Meyers | X-ray |
| Duane Michals | Photographs accompanied by his writing, does sequences/stories |
| Lee Miller (1907-1977) | May Ray, Paris, World War II |
| Arno Rafael Minkkinen | Human landscapes, did a great book, Frostbite |
| Richard Misrach | Landscapes |
| Lisette Model | Taught Diane Arbus |
| Andrea Modica | Barbara, from the book, Treadwell, the child had juvenile diabetes |
| Tina Modotti | Nature, portraits |
| László Moholy-Nagy (1895-1946) | Bauhaus |
| Sarah Moon | Fashion |
| William Mortensen | People |
| Inge Morath | Diverse |
| Barbara Morgan (1900-1992) | Dance |
| Vik Muniz | Conceptual |
| Martin Munkacsi | Fashion |
| Nickolas Muray | Portraits, lover of Frida Kahlo |
| Eadweard Muybridge (1830-1904) | Human locomotion, early moving pictures |
| Carl Mydans | Depression, WWII |