The Diocese of Borongan (Lat: Dioecesis Boronganensis) is a Latin Church ecclesiastical jurisdiction or diocese of the Catholic Church in the Philippines. Created on October 22, 1960 by Pope John XXIII from territory of the Diocese of Calbayog, the diocese is a suffragan in the ecclesiastical province of the metropolitan Archdiocese of Palo.

Diocese of Borongan Dioecesis Boronganensis Diyosesis han Borongan Diyosesis ng Borongan
Catholic
Borongan Cathedral
Coat of arms
Location
Country	Philippines
Territory	Eastern Samar
Ecclesiastical province	Palo
Statistics
Area	4,339 km2 (1,675 sq mi)
Population - Total - Catholics	(as of 2021) 496,000 491,000[1] (99%)
Parishes	33
Information
Denomination	Catholic Church
Sui iuris church	Latin Church
Rite	Roman Rite
Established	22 October 1960
Cathedral	Cathedral of the Nativity of the Blessed Virgin Mary
Secular priests	70
Current leadership
Pope	Francis
Bishop	Crispin Barrete Varquez
Metropolitan Archbishop	John F. Du
Vicar General	Lope C. Robredillo
Episcopal Vicars	Dan Gañas Leroy Geli Joberto Picardal

Bishop Vicente Reyes was the first diocesan bishop. On June 19, 1965, the island of Samar was politically divided and the province of Eastern Samar was born. Thus the island of Samar has three dioceses: Calbayog for Western Samar, Catarman for Northern Samar and Borongan for Eastern Samar.

Eastern Samar has a population of 374,255, 97 percent are Catholics. It is subdivided into 1 city and 22 municipalities. It has a land area of 4,470.75 square kilometers. It is bounded on the north by Northern Samar, on the east by the Philippine Sea, on the west by Western Samar and on the south by Leyte Gulf.

The Diocese of Borongan is divided into three regions, each has two vicariates. The episcopal see is Borongan. The diocese has experienced no jurisdictional changes since being erected.^{[citation needed]}

Crispin Barrete Varquez was appointed its bishop in 2007.