Barangay Camp One

Barangay Camp One forms part of Rosario, a municipality in La Union, and is classified as a mid-sized barangay.

According to the 2020 Philippine census, Barangay Camp One had a population of 3,244. This made it the 3rd largest of 33 barangays in Rosario by population, placing it among the most populous barangays of the municipality. Residents of Barangay Camp One accounted for approximately 5.38% of the total population of Rosario, which stood at 60,278 in the same census year.

The barangay recorded 3,213 residents in the 2015 intercensal count and 3,244 residents in the 2020 Census — a net change of +1.0%, consistent with a slowly expanding settlement. Barangay Camp One is officially classified as urban, reflecting the density and built-up character of the area.

Rosario is a municipality comprising 33 barangays, and serves as the governing unit directly responsible for local services in Barangay Camp One, including public health, sanitation, peace and order, and civil registration. Within the wider province of La Union, which contains 576 barangays across its component cities and municipalities, Barangay Camp One ranks 30th by 2020 population. La Union is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Like every Philippine barangay, Barangay Camp One is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.