'''SECA''', '''SecA''' or '''Seca''' may refer to:
* Société Européenne de Contrôle d'Accès, now Nagra France * The SECA Mediaguard encryption system, designed by the above company. * Society for the Encouragement of Contemporary Art, an auxiliary part of the San Francisco Museum of Modern Art ** The SECA Art Awards granted by this Society * Southern Early Childhood Association (SECA) * Solid State Energy Conversion Alliance (SECA) * Seča, a village in the Municipality of Piran, southwestern Slovenia * Seca GmbH & Co. KG., a German company * SecA protein - an ATPase in the bacterial translocase pathway * SecA or secondary average, baseball statistic * Sulphur Emission Control Area: areas of the North Sea and the California coast where low-sulphur heavy fuel oil must be used aboard ships, as defined in MARPOL Annex VI. * Self Employment Contributions Act, a payroll tax on self-employed workers in the United States similar to FICA. * The ICAO code for Ciudad de Catamayo Airport in Catamayo, Ecuador. * The Swedish Economic Crime Authority (SECA or EBM, ''Ekobrottsmyndigheten'').
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