As part of the vault experiment, it is populated by 1 man and 999 women.
Vault 68 is Vault 69's counterpart, which contains 999 men and only 1 woman.
Behind the scenes
- The concept art for of Vault 69 was made by one of the Van Buren artists.
- The numbering and purpose of this vault are a tongue-in-cheek reference to the 69 sex position.