Thirtysomething is an American drama television series created by Edward Zwick and Marshall Herskovitz for United Artists Television (under MGM/UA Television) and aired on ABC from September 29, 1987, to May 28, 1991.

The series focuses on a group of baby boomers in their thirties who live in Philadelphia, and how they handle the lifestyle that dominated American culture during the 1980s given their involvement in the early 1970s counterculture as young adults. It premiered in the United States on September 29, 1987, and lasted four seasons. It was canceled in May 1991 by mutual agreement between the producers and the network. Zwick and Herskovitz moved on to other projects. The series won 13 Primetime Emmy Awards, out of 41 nominations, and two Golden Globe Awards.

On January 8, 2020, ABC confirmed that a television pilot, which would serve as a sequel to the series, had been ordered. The pilot was never filmed, but was set to be directed by Zwick, written by Zwick and Herskovitz, and have four members of the original cast (Ken Olin, Mel Harris, Timothy Busfield and Patricia Wettig) reprising their roles. In June 2020, ABC passed on the series.