[2] Neighboring districts are (from the east clockwise): Phanom Sarakham, Plaeng Yao, and Bang Khla of Chachoengsao Province; and Ban Sang of Prachinburi province.

The important water resource is the Khlong Tha Lat.

Ratchasan is divided into three sub-districts (tambons), which are further subdivided into 31 administrative villages (mubans).

There are three sub-district administrative organizations (SAO) in the district: Palmyrum is a local important industrial crop.

This Chachoengsao Province location article is a stub.