[1] Phimai is an area where evidence has been found of being the main residence of humans since the prehistoric period, approximately 1,700–3,000 years ago.

The base of the building is made of bricks under Prasat Hin Phimai, therefore, it is assumed that it was probably originally the location of a Buddhist monastery.

Queen Mother Sriphatcharindra (Saovabha) visited Prasat Phimai and Sai Ngam (ficus forest) in 1911.

The government officers and people renovated the city for the royal visit, and named six roads to commemorate the event.

The district is divided into 12 sub-districts (tambons), which are further subdivided into 208 villages (mubans).