 The name Pla Ma is the Thai name of the fish species "Boesemania microlepis", which is found a lot in the area of the district.Neighboring districts are (from the east clockwise) Phak Hai and Bang Sai of Ayutthaya Province, Song Phi Nong, U Thong and Mueang Suphan Buri of Suphan Buri Province.The main water resource of the district is the Tha Chin river or Suphan river.