The Roman Catholic Diocese of Katsina-Ala () is a diocese located in the city of Katsina-Ala in the ecclesiastical province of Abuja in Nigeria.
Its cathedral is the church of St. Gerald of Majella in Katsina-Ala.
The Diocese is located in a portion of Benue State and includes the districts of Katsina-Ala, Logo, and Ukum and portions of Guma, Taraba and Buruku.
The diocese was established on 29 December 2012 from the Diocese of Makurdi.