Step by Step is an American television sitcom created by William Bickley and Michael Warren for ABC's TGIF Friday night lineup. Set in Port Washington, Wisconsin, it follows single parents Frank Lambert and Carol Foster (Patrick Duffy and Suzanne Somers), each with three children, who wed and form a blended family in spite of their children's mutual resentment. It aired on ABC from September 20, 1991 to August 15, 1997, and then on CBS from September 19, 1997 to June 26, 1998, with a total of 160 half-hour episodes spanning seven seasons.

Among its co-stars are Staci Keanan, Angela Watson, and Christopher Castile as Carol's children Dana, Karen, and Mark, Brandon Call, Christine Lakin, and Josh Byrne as Frank's children J.T., Al, and Brendan, and Sasha Mitchell as Frank's nephew Cody.

The series was often described as a copy of The Brady Bunch because of its similar premise, and was otherwise ignored by critics after the pilot episode, which met with a consistently negative reception. Cancelled in May 1997 due to declining ratings, CBS acquired the series and Family Matters for their own Friday night comedy lineup, but only lasted for another season before it was officially cancelled in June 1998.