Robert Menzies McAlmon (also used Robert M. McAlmon, as his signature name, March 9, 1895 – February 2, 1956) was an American writer, poet, and publisher. In the 1920s, he founded in Paris the publishing house, Contact Editions, where he published Ernest Hemingway, Gertrude Stein, James Joyce and Ezra Pound.

McAlmon was born in Clifton, Kansas, the youngest of 10 children of an itinerant Presbyterian minister. He died in Desert Hot Springs, California, at age 60.

McAlmon studied for one semester as the University of Minnesota in 1916 before enlisting in the United States Army Air Corps in 1918. After World War I, he returned to university (1917–1920), this time at the University of Southern California. He attended classes intermittently until 1920, when he moved to Chicago and then New York City, where he worked as a nude model at an art school. Once in New York, he collaborated with William Carlos Williams on the Contact Review, which did not last for long but published poetry by Ezra Pound, Wallace Stevens, Marianne Moore, H.D., Kay Boyle, and Marsden Hartley.

The next year, he moved to Paris after marrying the wealthy English writer Annie Winifred Ellerman, better known as Bryher. This was a marriage of convenience which allowed Ellerman, a lesbian, to continue her relationship with Hilda Doolittle, and guarded McAlmon after he publicly identified himself as bisexual, stating: "I'm bisexual myself, like Michelangelo, and I don't give a damn who knows it." Ellerman divorced McAlmon in 1927.

McAlmon typed and edited the handwritten manuscript of Ulysses by James Joyce, with whom he had a friendship.

McAlmon became a prolific writer after the move, with many of his stories and poems based on his experiences as a youth in South Dakota.

Having published his book of short stories A Hasty Bunch with James Joyce's printer Maurice Darantière in Dijon in 1922, he founded the Contact Publishing Company in 1923 using his father-in-law's money. Lasting until 1929, Contact Editions brought out books by Bryher (Two Selves), H. D.'s Palimpsest, Mina Loy's Lunar Baedeker, Ernest Hemingway's first book Three Stories & Ten Poems (1923), poems by Marsden Hartley, William Carlos Williams (Spring and All, 1923), Emanuel Carnevali's only book during his lifetime (The Hurried Man), prose by Ford Madox Ford, Gertrude Stein (The Making of Americans, 1925), Mary Butts (Ashe of Rings), John Herrmann (What Happens), Edwin Lanham (Sailors Don't Care), Robert Coates (The Eater of Darkness), Texas schoolteacher Gertrude Beasley's My First Thirty Years and Saikaku Ihara's Quaint Tales of Samurais. McAlmon paid for the publication of The Ladies Almanack by Djuna Barnes.

One of McAlmon's most important and best-received works is Village: As It Happened Through a Fifteen Year Period (1924) which presents a bleak portrait of an American town. The book shows his love for Eugene Vidal (Eugene Collins in the book), Gore Vidal's father, with whom he grew up in Madison, South Dakota, which is documented in Gore Vidal's mid-90s memoir, Palimpsest.