"I Saw Mommy Kissing Santa Claus" is a Christmas song with music and lyrics by Tommie Connor.

The original recording by Jimmy Boyd reached number one on the Billboard charts in 1952, and on the Cash Box magazine chart at the beginning of the following year. The song was commissioned by Neiman Marcus to promote the store's Christmas card for the year, which featured an original sketch by artist Perry Barlow, who drew for The New Yorker for many decades.

Jimmy Boyd's record was condemned by the Roman Catholic Church in Boston when it was released on the grounds it mixed sex with Christmas. Boyd, age thirteen, was photographed meeting with the Archdiocese to explain the song. After the meeting, the ban was lifted.[1]

The song has been recorded by Molly Bee, The Jackson Five, John Mellencamp, the Hampton String Quartet (the title track of their album, "What if Mozart Wrote 'I Saw Mommy Kissing Santa Claus'?"), Jessica Simpson, Bif Naked, and Twisted Sister on their 2006 A Twisted Christmas album. Phil Spector recorded "I Saw Mommy Kissing Santa Claus" with the Ronettes. Comedian Kip Addotta recorded a parody called "I Saw Daddy Kissing Santa Claus" that gets played during Christmas time on the Dr. Demento radio show.