Bang Pahan (Thai: บางปะหัน, pronounced [bāːŋ pā.hǎn]) is a district (amphoe) in the northern part of Ayutthaya province.

The Phuan people from Vientiane who migrated around this area in the reign of King Rama II established the settlement.

Neighboring districts are (from the north clockwise) Maha Rat, Nakhon Luang, Phra Nakhon Si Ayutthaya and Bang Ban of Ayutthaya province, and Pa Mok of Ang Thong province.

The district is divided into 17 sub-districts tambon, which are further subdivided into 94 villages muban.

This Ayutthaya Province location article is a stub.