MAFF(S) may refer to:

• MAFF (gene), a transcription factor
• Malmö Arab Film Festival, held in Malmö (Sweden), the largest Arabic film festival in Europe
• Ministry of Agriculture, Fisheries and Food (United Kingdom), a former department of UK government
• Ministry of Agriculture, Forestry and Fisheries, Cambodia
• Ministry of Agriculture, Forestry and Fisheries (Japan)
• Modular Airborne FireFighting System wildland firefighting system installable on large aircraft
• Mozilla Archive Format, a web page archiving format provided by Firefox through an extension