"Merry Xmas Everybody" is a song by the British rock band Slade, released as a non-album single in 1973. The song was written by lead vocalist Noddy Holder and bassist Jim Lea, and it was produced by Chas Chandler. It was the band's sixth and final number-one single in the UK. Earning the UK Christmas number one slot in December 1973, the song beat another Christmas-themed song, Wizzard's "I Wish It Could Be Christmas Everyday", which reached fourth place. It remained in the charts for nine weeks until February 1974.

Slade are an English rock band formed in Wolverhampton in 1966. They rose to prominence during the glam rock era in the early 1970s, achieving 17 consecutive top 20 hits and six number ones on the UK Singles Chart. The British Hit Singles & Albums names them the most successful British group of the 1970s based on sales of singles. They were the first act to have three singles enter the charts at number one; all six of the band's chart-toppers were penned by Noddy Holder and Jim Lea. As of 2006, total UK sales stood at over 6,500,000. Their best-selling single, "Merry Xmas Everybody", sold in excess of one million copies. According to the 1999 BBC documentary It's Slade, the band have sold more than 50 million records worldwide.