Ratsada (, ) is a district (amphoe) in the northeastern part of Trang province, Thailand.
The minor district (king amphoe) Ratsada was established on 1 April 1991 by splitting off five tambons from Huai Yot district. It was upgraded to a full district on 5 December 1996.
Neighboring districts are (from the south clockwise): Huai Yot of Trang Province; Bang Khan and Thung Song of Nakhon Si Thammarat province.
The district is divided into five sub-districts (tambons), which are further subdivided into 50 villages (mubans). Khlong Pang is a township (thesaban tambon) which covers parts of tambon Khlong Pang. There are a further five tambon administrative organizations (TAO).