The town of Naujan was already a geographic reality even before the Spanish colonization. Known as Nauhang by early. European cartographers, it was organized in 1639 under a Royal Decree by King Phillip of Spain then confirmed by Act No. 1280 of the Philippine Commission on January 4, 1905. However, ecclesiastical records indicate that Naujan was already an administrative center for evangelization around 1578.

From an article written by a Jesuit, Miguel Bernal, it was reported that Juan Medina in 1630 spelled Naujan as Nauhang, as did the King of Spain in a Royal Decree of 1639. Navarettee, who visited in 1654, spelled it Nanhoan. But the Jesuit historian, Pedro Murillo Velarde whose book was published in 1749, spelled it Naujan that has become the standard spelling.

Organization of pueblo or town is not solely an internal. matter. Territorial boundaries had been delineated. The boundary line with Calapan was fixed in 1920’s along the former Barangay Nag-ibang Naujan which was later divided into 2 administrative units Nag-Iba I and Nag-Iba II.

On January 31, 1927, the official boundary lines of Naujan and Pola were fixed at the Merit, Tigbao and Taguan River. Earlier on June 22, 1921, the municipality was divided into 9 districts. By 1923, Naujan had 9 barrios.

By December 1955, 50 barrios composed the jurisdictional territory of Naujan. In 1983, several sitios were elevated into barrio status bringing the total number of barrios/barangays to 70 distributed over an area of 52,804.15 hectares with Victoria already separated 30 years ago having attained municipality status.