The Roman Catholic Archdiocese of Arusha (Latin: Archidioecesis Arushaënsis) is the Metropolitan See for the ecclesiastical province of Arusha in Tanzania.
| Jurisdiction: | Archdiocese |
| Arusha | |
| Latin: | Archidioecesis Arusha |
| Local: | Jimbo Kuu Katoliki la Arusha |
| Territory: | Arusha |
| Province: | Arusha |
| Headquarters: | St Theresa's Metropolitan Cathedral (Arusha) |
| Area Km2: | 67,340 |
| Population: | 2,868,240 |
| Population As Of: | 2018 |
| Catholics: | 572,590 |
| Catholics Percent: | 20% |
| Parishes: | 55 |
| Churches: | 130 |
| Denomination: | Catholic |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | March 1, 1963 |
| Cathedral: | St. Theresa’s Metropolitan Cathedral |
| Priests: | 137(total) 58(diocesan) 79(religious) |
| Bishop: | Isaac Amani Massawe |
| Bishop Title: | Archbishop |
| Suffragans: | Moshi Mbulu Same |
| Auxiliary Bishops: | Prosper Balthazar Lyimo |
| Vicar General: | Simon Tenges |
| Emeritus Bishops: | Josaphat Louis Lebulu |
| Website: | |
| Metropolitan: | Arusha |
| Founded: | 1 march 1963 |
| Language: | swahili |
Roman Catholic Archdiocese of Arusha is among 34 Dioceses of Catholic Church of Tanzania, which are practising Roman rite. According to history, evangelisation in Arusha started in July 15, 1926 when Holy Ghost Fathers Missionaries from Kilimanjaro were invited to visit Arusha. At that moment Arusha was the part of Kilimanjaro Vicariate. These priests arrived in Arusha and opened Mission in an area known as Mesopotamia.The Mission centre of Mesopotamia was developed slowly into a Parish, which is known as St Theresa of Child Jesus Parish.[1]
The seat of the archbishop is St. Theresa’s Metropolitan Cathedral in Arusha.