Rain song refers to:

Rain song, songs sung during rainmaking rituals (eg. Rain Queen#Rain song)

RainSong, a US-based acoustic guitar manufacturer Rain Song (al-Sayyab), Arabic poetry collection and the title poem by Iraqi poet al-Sayyab, 1960 "The Rain Song", a song by the rock band Led Zeppelin "Rain Song", a 2000 song by Japanese musician Taiji "Rain Song", a 2021 song from the soundtrack to Minari by Emile Mosseri

See also Rain dancing, a ceremony to ensure seasonal rains vital to the harvest Rain (disambiguation)#Songs