Calbayog City is situated on the western part of Samar, bounded on the north by Catarman, Mondragon, San Isidro and Pambujan, on the east by Sta. Margarita and Gandara, and on the west and south by the Samar Sea. It has 157 barangays.

The city has a land area of 903 square kilometers. In 1995, it had a population of 129,616. The dialect spoken by the Samareños is Samar-Leyte (Waray). Some people believed that the word Calbayog was derived from the combined words cal (the Spanish word for lime) and bayog (tree from which lime is extracted).

The others, however, believed it was derived from Kan Bayog, meaning, Bayog's place. The forerunner of Calbayog settlement was Caybago. From here, the inhabitants moved to Anislag, which was found to be unsafe, because it was always visited by flood.

The settlers decided to move downward, following the course of the river toward the sea. Finally, they transferred to Tabok, now known as Calle Buroka, where Fr. Sebastian Gomez became the first parish priest of Calbayog from 1836 to 1855. He initiated the construction of the Cathedral de San Pedro y Pablo and the barracks. In 1901, Rufino Pido was appointed Presidente Municipal.

The Paulistas founded the Colegio Seminario de San Vicente de Paul in 1905. Calbayog City, then a municipality, was occupied by the Japanese Forces from May 27, 1942, until the coming of the American Forces in January 1945. The City, comprising the present municipalities of Calbayog, Oquendo and Tinambacan, was created on July 15, 1948, by Republic Act No. 328, which was later amended by Republic Act No. 3279 on June 17, 1961. Calbayog City is situated on the western part of Samar, bounded on the north by Catarman, Mondragon, San Isidro and Pambujan, on the east by Sta. Margarita and Gandara, and on the west and south by the Samar Sea. It has 157 barangays.

The city has a land area of 903 square kilometers. In 1995, it had a population of 129,616. The dialect spoken by the Samareños is Samar-Leyte (Waray). Some people believed that the word Calbayog was derived from the combined words cal (the Spanish word for lime) and bayog (tree from which lime is extracted).

The others, however, believed it was derived from Kan Bayog, meaning, Bayog's place. The forerunner of Calbayog settlement was Caybago. From here, the inhabitants moved to Anislag, which was found to be unsafe, because it was always visited by flood.

The settlers decided to move downward, following the course of the river toward the sea. Finally, they transferred to Tabok, now known as Calle Buroka, where Fr. Sebastian Gomez became the first parish priest of Calbayog from 1836 to 1855. He initiated the construction of the Cathedral de San Pedro y Pablo and the barracks. In 1901, Rufino Pido was appointed Presidente Municipal.

The Paulistas founded the Colegio Seminario de San Vicente de Paul in 1905. Calbayog City, then a municipality, was occupied by the Japanese Forces from May 27, 1942, until the coming of the American Forces in January 1945. The City, comprising the present municipalities of Calbayog, Oquendo and Tinambacan, was created on July 15, 1948, by Republic Act No. 328, which was later amended by Republic Act No. 3279 on June 17, 1961.