Eastern Samar (Waray-Waray: Sinirangan Samar; Tagalog: Silangang Samar), officially the Province of Eastern Samar, is a province in the Philippines located in the Eastern Visayas region. Its capital is the city of Borongan. Eastern Samar occupies the eastern portion of the island of Samar. Bordering the province to the north is the province of Northern Samar and to the west is Samar province. To the east lies the Philippine Sea, part of the vast Pacific Ocean, while to the south lies Leyte Gulf.
 During his circumnavigation of the globe, Ferdinand Magellan had set foot on the tiny island of Homonhon in the southern part of the province. On March 16, 1521, the area of what is now Eastern Samar is said to be the first Philippine landmass spotted by Magellan and his crew.
 Maj. Eugenio Daza Area Commander of General Lukbán's forces for Southeastern Samar
 On September 28, 1901,  Filipino guerrillas led by Valeriano Abanador and Eugenio Daza in Balangiga ambushed American troops, killing 48 members of the US 9th Infantry. The incident triggered the infamous American retaliation March across Samar against the Samar populace and guerrillas.
 In 1944, combined Filipino-American troops involved in the liberation of the Philippines from Japan built in the town of Guiuan the largest military base in the Pacific. In the same town in 1949, approximately 5,000 Russian refugees escaping from communist China temporarily settled on Tubabao Island until 1951, when they were transferred to Australia and the United States.
 Eastern Samar, as a province, was created from Samar province through Republic Act No. 4221 on June 19, 1965. Approved by Congress in 1963, it was authored by Samar congressmen Eladio T. Balite (1st district), Fernando R. Veloso (2nd district), and Felipe J. Abrigo (3rd district). The law, ratified in a plebiscite on June 19, 1965, divided Samar into three: Northern Samar, Eastern Samar and (Western) Samar.
 Typhoon Haiyan (Yolanda), one of the strongest typhoons ever recorded, made its first landfall in the coastal town of Guiuan in November 2013.
 Eastern Samar covers a total area of 4,660.47 square kilometers (1,799.42 sq mi) occupying the eastern section and majority of southern Samar's coast of Samar Island in the Eastern Visayas region. The province is bordered to the north by Northern Samar and to the west by Samar. To the east lies the Philippine Sea, part of the vast Pacific Ocean, while to the south lies Leyte Gulf.
 Because it faces the Philippine Sea of the Pacific Ocean, Eastern Samar suffers heavily from powerful typhoons.
 Eastern Samar comprises 22 municipalities and one city, all encompassed by an lone congressional district and two provincial districts that elect a representative and provincial board members, respectively.
  
 The population of Eastern Samar in the 2020 census was 477,168 people, with a density of 100 inhabitants per square kilometre or 260 inhabitants per square mile. The predominant language is Waray and it is the main lingua franca of the entire island of Samar.[citation needed]
 In the 2000 Census, Warays comprised 97.78% (366,787) of the total provincial population of 375,124 at that time. Kapampangan came second at 0.55% (2,067), Bisaya/Binisaya 0.43% (1,613), Cebuano at 0.18% (680), and Tagalog at 0.17% (621).
 The people of the province are devoted Christians where a majority adhere to Roman Catholicism. The dominant Catholic faith influences the events of the provincial education, politics and social functions of the people. Other Christians usually form the remaining groups of believers such as the Born-again Christians, Protestants, Iglesia Filipina Independiente or Aglipayan church, Jehova's Witnesses, Iglesia ni Cristo, Baptists, Methodists, The Church of Jesus Christ of Latter-day Saints, and Seventh-day Adventists. Non Christians (mostly Muslims) are also found.
 The province has one operational airport; Borongan Airport located in the capital city. Currently, only Leascor operates out of Borongan Airport with flights weekly to serve locals and tourists to and from Cebu.
 By land, mini buses and vans ply from the regional center in Tacloban, Catbalogan, and Calbayog in Samar province and to some towns in Eastern Samar. From Borongan, buses ply to Metro Manila. Motorized boats plies through Leyte Gulf ferrying passengers going to Tacloban City seaport.
 Commercial activities in the province are centered on the provincial capital of Borongan while tourism activities are centered in Guiuan town where Calicoan Island and the historical Homonhon Island are located. Generally, the province's major economic resource is fishery and agriculture which include production of coconut, copra, corn, rice, sugar, and vegetables. Tourism potential is untapped on the northern part of the province.
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