7 billion or Seven billion may refer to: 7 Billion Actions, A campaign to commemorate the world's population reaching 7 billion 7 Billion Needles, A Japanese manga 7 Billion Others, A video series by Yann Arthus-Bertrand Day of Seven Billion, the day when the world's population reached 7 billion 7 000 000 000, a 2021 rock album by Hurd