Chasa is an Indian caste from the Odisha state. Chasa's were traditionally cultivators, but are now engaged in several professions. They are divided in various sub-classes.According to varna system in odisha Kshetriya have 3 category as per work 1.-Khandayat,2.-Chasa,3.-Samanta .They live in all over odisha .
The common surnames among the Chasa's in Orissa are Biswal, Behera,Khuntia, Parida, Pradhan,Raut, Sahu/Sahoo, Samal,Sendha, Swain etc.
References
Chasa caste Wikipedia(Text) CC BY-SA