Pratunam, written as Pratu Nam (Thai: ประตูน้ำ, pronounced [prātūːnáːm]), is an intersection and neighborhood in Bangkok.

It is located in Thanon Phaya Thai sub-district, Ratchathewi district.

There were two other water gates in Chachoengsao province which were built in the same period.

There are many shopping centers and department stores in the area such as Platinum Fashion Mall, Pratunam Market, CentralWorld, Big C Supercenter (Big C Rajdamri), etc.

It is close to two other important intersections such as Ratchaprasong and Pathum Wan, and is also a location of Pratunam pier of Khlong Saen Saep boat service.