Lookinland provided the voice of Oblio in the 1971 animated film The Point!. Shortly after the final season of The Brady Bunch wrapped filming, he appeared alongside Jennifer Jones and Paul Newman in the 1974 disaster film blockbuster The Towering Inferno and on the 1970s TV show The Secrets of Isis.

He wed Kelly Wermuth (born 1962), an occasional actress, on May 1, 1987 and, together, they have two children, sons Scott Michael Lookinland (born July 6, 1990), who portrayed him in Growing Up Brady (2000), and Joseph Kelly “Joe” Lookinland (born August 6, 1993), both born in Utah. The two worked together, with Lookinland as a production assistant and Wermuth as an extra on Halloween 4: The Return of Michael Myers and Halloween 5: The Revenge of Michael Myers.

Lookinland reprised his role as Bobby Brady in the 1988 Christmas special A Very Brady Christmas and again in the 1990 sequel series The Bradys, in which Bobby Brady was involved in a racing-car accident, which made him a wheelchair user throughout the series. Lookinland spent several years as a television camera operator and made an uncredited appearance in the 2000 TV movie Growing Up Brady as a camera operator filming an episode of The Brady Bunch. He also joined with the other Brady Bunch children in the 2019 television series A Very Brady Renovation on HGTV.

Lookinland is a self-described Deadhead, having attended more than 100 Grateful Dead concerts and shows. In 1989, the California skate rock band Wonderful Broken Thing recorded their debut full-length album “Looking For Mike Lookinland”; several songs from this album were featured on the H-Street video “Hokus Pokus.”