Martin Grams, Jr. (b. April 19, 1977, Baltimore, Maryland) is an old time radio historian who has written authoritative articles and books on radio, television and films. The son of magician Martin Grams, Sr. and librarian Mary Pat Grams, he was educated at South Eastern School District in York County, Pennsylvania and graduated from Kennard Dale High School in Fawn Grove, Pennsylvania in 1995. He worked a variety of jobs from factory labor to banking before settling on a writing career.

Since 1998 Grams has documented broadcasting in the 20th century. Suspense: Twenty Years of Thrills and Chills (Morris, 1998) was followed by The History of the Cavalcade of America (Morris, 1999) about the Dupont-sponsored radio and television program of the same name. After The CBS Radio Mystery Theater, co-authored with Gordon Payton for McFarland Publishers, Grams followed with Radio Drama (McFarland), The Have Gun – Will Travel Companion, co-authored with Les Rayburn, and The Alfred Hitchcock Presents Companion (OTR Publishing, 2000), a 660-page survey of Alfred Hitchcock Presents with a complete episode guide.

Francis M. Nevins and Grams teamed for The Sound of Detection: Ellery Queen's Adventures in Radio, a revision of the 1981 study by Nevins and Ray Stanich. Inner Sanctum Mysteries: Behind the Creaking Door covered both the radio and TV series with an appendix on all of Simon & Schuster's mystery novels, three short stories based on uncirculating radio programs, plus a chapter about the Inner Sanctum movies penned by Gregory William Mank.

After the limited edition Invitation to Learning (OTR Publishing), Grams wrote The I Love A Mystery Companion, unearthing never-before-published material by Carlton E. Morse. The book covers I Love A Mystery, I Love Adventure, Adventures by Morse, Captain Post, The Return of Captain Post, The Cobra King Strikes Back, The Witch of Endor, The House of Myths and others.

Information Please (Bear Manor Media, 2005) includes a chapter on the Information Please Almanac. Gang Busters: Crime Fighters of American Broadcasting (2005) weighs in at 700 pages. In addition to magazine articles (Filmfax, Scarlet Street and Radiogram), Grams has contributed short stories, chapters and appendixes for other books, including The Alfred Hitchcock Story (Titan) and It's That Time Again (Bear Manor).

Bear Manor's 2007 list includes two by Grams: The Railroad Hour, co-authored with Gerald Wilson, covers the 1948-54 radio program. I Led Three Lives covers the history of the TV series which starred Richard Carlson as Herbert A. Philbrick.

Grams' endeavors include convention organizer for the Mid-Atlantic Nostalgia Convention, held annually in Aberdeen, Maryland.

A resident of Delta, Pennsylvania, Martin Grams Jr. married in September 2005. Martin and his wife are both active in environmental protection programs and help support the funding and physical labor that goes into planting new trees, recycling and alternative resources for electricity, including solar power and wind power.