Alpha 4 is a science fiction anthology edited by American writer Robert Silverberg, first published in 1973.

• Introduction by Robert Silverberg
• "Casablanca" by Thomas M. Disch
• "Dio"' by Damon Knight
• "Eastward Ho!" by William Tenn
• "Judas Danced" by Brian W. Aldiss
• "Angel's Egg" by Edgar Pangborn
• "In His Image" by Terry Carr
• "All Pieces of a River Shore" by R.A. Lafferty
• "We All Die Naked" by James Blish
• "Carcinoma Angels" by Norman Spinrad
• "Mother" by Philip José Farmer
• "5,271,009" by Alfred Bester

• Goodreads listing for Alpha 4
• MIT Science Fiction Society's Library Pinkdex Entry for Alpha 4