List of songs written by Justin Tranter

Justin Tranter is an American singer-songwriter and activist. After reaching notoriety as a singer, as the front man of rock band Semi Precious Weapons, Tranter turned to writing for other artists and developed a close writing partnership with Julia Michaels. During that time, they have scored numerous Billboard chart-toppers and were labelled as one of Rolling Stone's "20 Biggest Breakouts of 2015" for their writing efforts of that year.

This list of songs is split into the full list of contributions and those that have performed in the charts across various countries. Additionally, the international singles and certifications are placed by order of the song's initial release, which may coincide with an album release.