I didn't know, MerryCary. Wikipedia has this article
about Bing's "White Christmas Album".
According to that article, yes. "White Christmas" (containing four additional tracks) released in 1955 wins in the Christmas category as longest in print. Otherwise, if I understand correctly, it is second following the original cast recording of "Oklahoma!".
But Elvis trumps Bing in copies sold!
Originally Posted by Courtney
Not a song in particular, but as a child, my Mom used to play the Bing Crosby "White Christmas" album (yes, an actual vinyl record!), while she decorated the house for Christmas, and I always loved those memories. I think I may still have that album tucked away somewhere. - So, I make sure that Christmas music is played frequently throughout the season in my house, because I want my child's Christmas memories to always include the beauty of music.
Originally Posted by MerryCarey
It's available on CD and MP3 downloads. It may be the album (or at least Christmas album) that has remained continuously in print the longest. (RadioJonD, do you know?)