The antiwar comedy, based on the 1970 film starring Donald Sutherland and Elliott Gould, debuted in 1972. The TV series, starring Alan Alda, had already won an Emmy for outstanding comedy series and had long been declared a "smash" by The Times.
He received eight Emmy nominations for the role and won once, in 1980, the same year he was nominated for directing an episode of "MASH."
Morgan also costarred in a spinoff sitcom, "AfterMASH," which was set in a stateside veterans hospital and aired from 1983 to 1984.
After that he appeared in about 20 more TV productions, including a few episodes of "3rd Rock from the Sun" in the late 1990s.
Photos: Harry Morgan | 1915 - 2011
When "MASH" was ending in 1983 he told The Times: "The sadness will fade after a while. The cup is so damn full that you can't really be sad that you don't have any more. We've all gotten so much more than we ever would have doing anything else. That will last a long, long time."
With his first wife, Eileen, Morgan had four sons. She died in 1985 after 45 years of marriage. A son, Daniel, died in 1989.
Survivors include his second wife, Barbara; his sons Christopher, Charles and Paul; eight grandchildren and seven great-grandchildren.
Stassel is a former Times staff writer.