A letter box is a receptacle for receiving mail.

Letterbox may also refer to:

• Distribution of advertising mail by letter box drop
• Letterboxing (filming), the practice of transferring film shot in a widescreen aspect ratio to standard-width, resulting in a letterbox
• Letterboxing (hobby), outdoor orienteering game
• Letter Box (game show), a 1962 Australian game show
• "Letterbox", a song by They Might Be Giants from their 1990 album Flood
• Letterbox, a 2017 album by Marie Miller
• Device fingerprint § Offering a simplified fingerprint, also known as letterboxing, a method which mitigates Internet tracking by screen size

See also

• Letterboxd, a social networking site for films
• Party Time (TV series), an Australian game show

This disambiguation page lists articles associated with the title Letterbox.
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