Ultimate Christmas is a 1998 compilation of Christmas music by the Beach Boys released on Capitol Records. It rounds up all of the tracks from 1964's The Beach Boys' Christmas Album in addition to a handful of unreleased tracks from the aborted Merry Christmas from the Beach Boys album in 1977, some of which are alternative versions of songs included on M.I.U. Album the following year.

The Beach Boys' Christmas Album is the seventh studio album by the American rock band the Beach Boys, released November 9, 1964 on Capitol Records. It contains five original songs and seven standards on a Christmas theme. The album proved to be a long-running success during subsequent Christmas seasons, initially reaching No. 6 on Billboard's Christmas LP's chart in its initial release and eventually going gold. Music historian James Perone wrote that it is "regarded as one of the finest holiday albums of the rock era".