Dear John is a British sitcom, written by John Sullivan. Two series and a special were broadcast in 1986 and 1987.

The sitcom's title refers to "Dear John" letters, usually written by women to their partners as a means of ending a relationship. John discovers in the opening episode that his wife is leaving him for a friend. He is kicked out of his home, while still being expected to pay the mortgage, and forced to find lodgings. In desperation, he joins the 1-2-1 Singles Club and meets other people who have fared equally unfortunately in their romantic lives. The outside shots of houses were filmed in Melthorne Drive, South Ruislip.

In 1988, an American adaptation of Dear John was produced by Paramount for the NBC network, starring Judd Hirsch. That series lasted for four seasons.