SES or S.E.S. can refer to:

• SES, when used in sociology, is an acronym for socioeconomic status.
• SES, an acronym for State Emergency Service, an Australian volunteer organization.
• SES, an abbreviation for Société Européenne des Satellites, the original trading name of SES Astra.
• S.E.S. is a popular Korean pop group. In this case, it stands for Sea, Eugene, and Shoo.
• SES, the acronym for the Stock Exchange of Singapore, which has merged with the Singapore International Monetary Exchange (SIMEX) on December 1, 1999 to form the Singapore Exchange (SGX).
• SES, the acronym for Steeds Eendrachtig Samenwerken, which is the name of a soccer club of the village Langenboom located in the south of the Netherlands.