Nangan Township is a township in the Matsu Islands and the county seat of Lienchiang County, Taiwan.
Nangan was also known Nangantang (南竿塘; Nàng-găng-dòng) and Shanggantang (上竿塘). And because Lin Moniang's (who later became the goddess Matsu) corpse was washed ashore here, Nangan was also known as Matsu Island (馬祖島; Mā-cū-dō̤).
There is an airport in Nangan. The highest point is Yuntai Mountain (雲台山) (248-metre).