Vincenzo A. Sagun is a coastal municipality in the province of Zamboanga del Sur.
The municipality has a land area of 63.00 square kilometers or 24.32 square miles which constitutes 1.40% of Zamboanga del Sur’s total area. Its population as determined by the 2020 Census was 24,852. This represented 2.37% of the total population of Zamboanga del Sur province, or 0.64% of the overall population of the Zamboanga Peninsula region. Based on these figures, the population density is computed at 394 inhabitants per square kilometer or 1,022 inhabitants per square mile.