CSAT may refer to:
- College Scholastic Ability Test, a standardized test in South Korea
- Supreme Council of National Defense (Romania) (Consiliul Suprem de Apărare a Ţării), an autonomous administrative authority in Romania
- Customer satisfaction measure or index (Market Research)
- Circuit satisfiability problem, a classic NP-complete problem in computer science
- Commonwealth Secretariat arbitral tribunal
- Civil Services Aptitude Test, a compulsory paper for IAS preliminary exam.
- Certified Sex Addiction Therapist, a therapeutic accreditation granted by the International Institute for Trauma and Addiction Professionals