Basco, officially the Municipality of Basco, is a municipality and capital of the province of Batanes, Philippines. According to the 2024 census, it has a population of 9,647 people.

The town is the most populous town in Batanes and is located on Batan Island, the second largest among the Batanes Islands, the northernmost group of islands of the Philippines. The town has an airport, Basco Airport, that serves domestic flights from Manila, Tuguegarao, and Itbayat. Despite its proximity to East Asian cities, there are no international flights.

The Basco Lighthouse is one of the landmarks. There is also the Basco Cathedral here.

The town is named after Capitán General José Basco, who led the pacification and conquest of the islands during his term as governor-general.

The municipality has a land area of 49.46 square kilometres (19.10 sq mi)  constituting 22.58% of the 219.01-square-kilometre- (84.56 sq mi) total area of Batanes.

Basco is politically subdivided into 6 barangays. Each barangay consists of puroks and some have sitios.

The sitio of Diptan was converted into a barrio, known as San Antonio, in 1955. Also in the same year, the sitios of Coral, Hago, Tuva, Diojango, Canalaan, Honaan and Dimnalamay were amalgamated into the barrio of San Joaquin.

Basco has a tropical monsoon climate (Köppen climate classification Am). Compared to cities such as Laoag or Manila, it has a slightly cooler temperatures especially during the winter months due to its northerly location. Unlike these two cities whose hottest months are April and May, Basco has its warmest temperature during the months of June and July, similar to Taiwan.