Cert or CERT may refer to:
- Carbon Emission Reduction Target, a United Kingdom government initiative
- CERT Group of Companies, a private education provider in the Middle East
- Constant extension rate tensile testing, a standard method of testing of materials, also known as slow strain rate testing
- Certificate (disambiguation), several meanings
- Certiorari, a Latin legal term for a court order requiring judicial review of a case
- Certiorari before judgment, a specific form of a writ of certiorari
- Cert pool, shorthand term for the pool of applicants for a writ of certiorari from the United States Supreme Court
- Community emergency response team, teams of volunteer emergency responders across the United States
- Computer emergency response team, an expert group that handles computer security incidents
- CERT Coordination Center (CERT/CC), the worldwide center for coordinating information about Internet security at Carnegie Mellon University, the first and most well-known CERT
- CERT C Coding Standard, developed by the CERT/CC at Carnegie Mellon University
- United States Computer Emergency Readiness Team (US-CERT)
- CERT Coordination Center (CERT/CC), the worldwide center for coordinating information about Internet security at Carnegie Mellon University, the first and most well-known CERT
- Correctional emergency response team, a team of correction officers
- Council of Energy Resource Tribes, a consortium of tribes to establish tribal control over natural resources
- Council of Education, Recruitment and Training Irish hospitality training authority 1963–2003