Dian Marie Mercado
- Birth Name: Dian Marie Rele Mercado
- Stage Name: Dian Marie Mercado
- Nickname: Dian
- Birthdate: June 30, 2002
- Birthplace: Davao City, Metro Davao, Mindanao, Philippines
- Height: 154cm
- Specialties: Spoken poetry and drawing
- Bands / Groups:
- Her favorite colors are peach, black, and white.
- She admires Kashiwagi Yuki and Oshima Yuko.
- Her favorite AKB48 song is "47 no Suteki na Machi e".