Events that occurred on 15 June.
 On Earth
- 1948 - J.R.R. Tolkien writes Letter 115.
- 1954 - J.R.R. Tolkien writes Letter 147.
- 1964 - J.R.R. Tolkien finishes writing a a letter to W.R. Matthews.
- 1967 - J.R.R. Tolkien records verses for the record Poems and Songs of Middle Earth.
- 2003 - Voice actor Philip Stone dies.
- 2007 - "Treachery and Deceit", the sixteenth set in The Lord of the Rings Trading Card Game, is released.
- 2014 - Voice actor Casey Kasem dies.
 In Arda
- There are no known events for this day.