The diocese of Kondoa (in Latin: Dioecesis Kondoaënsis) is a see of the Roman Catholic Church suffragan of the Archdiocese of Dodoma.

The diocese corresponds to the Kondoa District, in Tanzania.

The see is located in the city of Kondoa, since 2011 and the construction of the cathedral of the Holy Spirit.

The diocese was created on March 12, 2011 by the Papal bull Cum ad provehendam of Pope Benedict XVI, taking territories from the Roman Catholic Diocese of Dodoma.

The diocese counted 541,345 inhabitants at its creation, among whom 46,067 were baptized, which is 8.5%.