Barnaby Jones is an American detective television series starring Buddy Ebsen as a formerly retired investigator and Lee Meriwether as his widowed daughter-in-law. They run a private detective firm in Los Angeles, California. The show was originally introduced as a midseason replacement on the CBS network and ran from 1973 to 1980. Halfway through the series' run, Mark Shera was added to the cast as a much younger cousin of Ebsen's character, who eventually joined the firm.

Barnaby Jones was produced by QM Productions (with Woodruff Productions in the final two seasons). It had the second-longest QM series run (seven and a half seasons), following the nine years of The F.B.I.. The series followed the characteristic Quinn Martin episode format with commercial breaks dividing each episode into four "acts," concluding with an epilogue. The opening credits were narrated by Hank Simms.

Jerry Goldsmith composed the series' distinctive theme music.

The first episode of the show, "Requiem for a Son", featured a crossover with another QM program, Cannon, with William Conrad guest-starring as detective Frank Cannon. There was another crossover between the two programs in the 1975 two-part episode "The Deadly Conspiracy".