Marijohn Wilkin (née Melson, formerly Russell, later Selman; July 14, 1920 – October 28, 2006) was an American songwriter, famous in country music for writing a number of hits such as "One Day At a Time" and "The Long Black Veil".

Wilkin won numerous awards over the years and was referred to as "The Den Mother of Music Row," as chronicled in her 1978 biography Lord, Let Me Leave a Song (authored with Darryl E. Hicks).

It was honored as “One of the 100 Most Important Books about Nashville’s Music Industry.”[1] Wilkin was born in Kemp, Texas, to Ernest and Karla Melson and raised in Sanger, north of Dallas.

Wilkin also wrote "The Long Black Veil" for Lefty Frizzell (with Danny Dill), "Cut Across Shorty" for Eddie Cochran (with Wayne P. Walker), and "I Just Don't Understand" which became a pop hit for Ann-Margret and was covered by The Beatles.

Although she was primarily a country songwriter, her songs have been recorded by several pop and rock acts, including Rod Stewart and Mick Jagger.

Marijohn Wilkin may be most famous for "One Day at a Time", often considered the biggest gospel song of the 1970s.

"[3] Johnny Duncan and Ed Bruce were among the many songwriters she helped get a foothold in the music business.