The anime adaptation of Toaru Kagaku no Railgun has just been confirmed for a third season! It will premiere in January 2020, and will be animated by JCStaff studio and directed by Tatsuyuki Nagai. The opening and ending themes will be performed by fripSide and Kishida Kyoudan & The Akeboshi Rockets, respectively.
In addition, a visual announcement poster for the anime was also released:
Via: Moetron