Thirty Million Letters (also known as 30 Million Letters) is a 1963 British short documentary film directed by James Ritchie and made by British Transport Films.
The film received a certificate of merit in the Documentary class at the 1963 Cork International Film Festival.
In 1964 it was nominated for an Academy Award for Best Documentary Short.
It is available as an extra on the 2007 British Film Institute DVD Night Mail.