Thirtysomething is an American television drama about a group of baby boomers in their thirties. It was created by Marshall Herskovitz and Edward Zwick for United Artists Television and premiered on ABC on September 29, 1987. It lasted four seasons, with the last of its 85 episodes airing on May 28, 1991.

The title of the show was designed as "thirtysomething" (with a lowercase "t") by Kathie Broyles, who combined the words of the original title, Thirty Something.

hirtysomething depicts the lives of a group of baby boomer yuppies during the late 1980s. They are bonded by their involvement with peace movement and Counterculture of the 1960s during their youth, a past which is in marked contrast to their current lives in Philadelphia, Pennsylvania.

Although seen as an ensemble drama, the series tended to revolve around Michael (Ken Olin) and Hope Steadman (Mel Harris), who provided the focal point for the group. Michael's cousin is photographer Melissa Steadman (Melanie Mayron). Michael's business partner is Elliot Weston (Timothy Busfield), who has a troubled marriage with his wife Nancy (Patricia Wettig). Michael's best friend is Gary Shepherd (Peter Horton) who eventually married Susannah (Patricia Kalember). Hope's best friend is Ellyn Warren (Polly Draper).