"One Day at a Time" is a popular country and western-style Christian song written by Marijohn Wilkin and Kris Kristofferson. It has been recorded by over 200 artists and has reached No. 1 in several territories. Scottish singer Lena Martell had a UK Singles Chart number one with her version in 1979.

Marijohn Wilkin was an American songwriter, famous in country music for writing a number of hits such as "One Day At a Time" and "My 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. It was honored as “One of the 100 Most Important Books about Nashville’s Music Industry.”