Diocese of Rio Branco Dioecesis Fluminis Albi Superioris
Cathedral of Our Lady of Nazareth
Location
Country	Brazil
Ecclesiastical province	Porto Velho
Statistics
Area	102,136 km2 (39,435 sq mi)
Population - Total - Catholics	(as of 2011) 502,000 378,000 (75.3%)
Parishes	27
Information
Denomination	Catholic Church
Rite	Roman Rite
Established	4 October 1919 (105 years ago)
Cathedral	Catedral Nossa Senhora de Nazaré
Current leadership
Pope	Francis
Bishop	Joaquín Pertíñez Fernández, O.A.R.
Metropolitan Archbishop	Roque Paloschi
Website
Official Website

The Roman Catholic Diocese of Rio Branco (Latin: Dioecesis Fluminis Albi Superioris) is a Latin suffragan see in the ecclesiastical province of the Metropolitan Archbishop of Porto Velho (Rondônia), in the upper Amazon River basin).

Its cathedral episcopal see is the Marian Catedral Nossa Senhora de Nazaré, dedicated to Our Lady of Nazareth, in the city of Rio Branco, Acre state, Brazil.

On 4 October 1919, Pope Benedict XV established the Territorial Prelature of Acre and Purus (Italian Acre e Purus), named after the Amazonian rivers Acre and Purus, on canonical territory split off from the then Diocese of Amazonas.

Pope Pius XI changed the name of the prelature to the Territorial Prelature of São Peregrino Laziosi no Alto Acre e Alto Purus on 10 December 1926, but its original name was restored on 26 April 1958 by Pope Pius XII.

The territorial prelature was elevated to a bishopric and hence renamed after its see as Diocese of Rio Branco by Saint John Paul II on 15 February 1986.^[1][2]

As per 2014, it pastorally serves 443,000 Catholics (75.1% of 589,625 total) on 104,473 km² in 32 parishes and 5 missions with 33 priests (23 diocesan, 10 religious), 22 deacons, 105 lay religious (19 brothers, 86 sisters) and 18 seminarians.

(all Roman Rite)^{[clarification needed]}

• Geraldo Van Caloen, O.S.B. (12 March 1906 – 13 Dec 1907 (resigned)), Titular Bishop of Phocæa (12 March 1906 – 16 January 1932 (died)); later Abbot nullius of Nossa Senhora do Monserrate do Rio de Janeiro (Brazil) (13 December 1907 – 18 May 1915)
• Próspero Gustavo Bernardi, Servite Order (O.S.M.) (15 December 1919 – 10 December 1926 (see below)), Titular Bishop of Paltus (15 December 1919 – 1 February 1944 (died))

• Próspero M. Gustavo Bernardi, (O.S.M.) ((see above) 10 December 1926 – 1 February 1944 (died))
• Apostolic Administrator Father Antônio Julio Maria Mattioli, Society of Mary (S.M.) (1941 – 10 January 1948 (see below))
• Antônio Julio Maria Mattioli, O.S.M. ((see above) 10 January 1948 – 13 April 1962 (see below)), Titular Bishop of Lacedæmonia (10 January 1948 – 13 April 1962 (died))

• Antônio Julio Maria Mattioli, S.M. ((see above) 26 April 1958 – 13 April 1962 (died))
• Giocondo Maria Grotti, O.S.M. (16 November 1962 – 28 September 1971 (died)), Titular Bishop of Thunigaba (8 July 1965 – 28 September 1971)
• Moacyr Grechi, O.S.M. (10 July 1972 – 15 February 1986 (see below)), Titular Bishop of Vegesela in Numidia (20 July 1973 – 26 May 1978 (died))^{[clarification needed]}

• Moacyr Grechi, O.S.M. ((see above) 15 February 1986 – 29 July 1998), next^{[clarification needed]} Archbishop of Rio Branco's Metropolitan see Porto Velho (Brazil) (29 July 1998 – 30 November 2011 (retired))
• Joaquín Pertíñez Fernández, Order of Augustinian Recollects (O.A.R.) (24 February 1999 – present),^{[clarification needed]} no prior office

• List of Catholic dioceses in Brazil

• GCatholic

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