Pathum Thani (Thai: ปทุมธานี, pronounced [pā.tʰūm tʰāːnīː]) is one of the central provinces (changwat) of Thailand. Neighboring provinces are (from north clockwise): Phra Nakhon Si Ayutthaya, Saraburi, Nakhon Nayok, Chachoengsao, Bangkok, and Nonthaburi.
The province is north of Bangkok and is part of the Bangkok metropolitan area. In many places, the boundary between the two provinces is not noticeable as both sides of the boundary are equally urbanized. Pathum Thani town is the administrative seat, but Ban Rangsit, seat of Thanyaburi district, is the largest populated place in the province.