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Straczynski was born in Paterson, New Jersey, and is the son of Charles Straczynski, a manual laborer, and Evelyn Straczynski (nee Pate). He was raised in Newark, New Jersey; Kankakee, Illinois; Dallas, Texas; Chula Vista, California, where he graduated from high school; and San Diego, California. Straczynski's family religion was Catholic, and he has Polish ancestry. His grandparents lived in the area which today belongs to Belarus, and fled to America from the Russian Revolution; his father was born in the U.S., and has lived in Poland, Germany and Russia.

In late 1991, Warner Bros. contracted with Straczynski and Doug Netter as partners to produce Babylon 5 as the flagship program for the new Prime Time Entertainment Network.  Straczynski and Netter hired many of the people from Captain Power, as well as hiring Ellison as a consultant and DiTillio as a story editor. Babylon 5 won two Emmy Awards, back-to-back Hugo Awards, and dozens of other awards. Straczynski wrote 92 of the 110 episodes, as well as the pilot and five television movies. The show is a character-driven space opera and features an intentional emphasis on realism in its portrayal of space operations. It also pioneered extensive use of CGI for its special effects. Babylon 5 was produced and broadcast for 5 seasons completing Stracynski's planned story arc. Its sequel, Crusade, was produced for the TNT Network, however it ended with only 13 episodes. Production was halted before the first episode aired.  He wrote the outlines for nine of the canonical Babylon 5 novels, supervised the three produced B5 telefilm novelizations (In the Beginning, Thirdspace, and A Call to Arms), and is the author of four Babylon 5 short stories published in magazines, not yet reprinted (as of 2008).  In 2005, Straczynski began publishing his Babylon 5 scripts. This process ended in June 2008, with the scripts no longer being available from the end of July of that year. His scripts for the television movies were published for a limited time in January 2009.  Straczynski also wrote and produced the pilot Babylon 5: The Legend of the Rangers, a pilot for the SciFi Network, and wrote, directed and produced Babylon 5: The Lost Tales as a two-hour direct-to-DVD movie.
J. Michael Straczynski