Is the song Santa Claus is coming to town in public domain?

No, the song "Santa Claus Is Coming to Town" is not in the public domain. It was written by John Frederick Coots and Haven Gillespie in 1934, and its copyright is still in effect. Generally, works published after 1923 are protected for a longer period, typically lasting until 70 years after the death of the last surviving author, meaning this song will remain under copyright until at least 2025.