APK may refer to:

• APK (file format), as in "filename.apk", Android Package, a packaging file format for the Android operating system
• Afrikaanse Protestantse Kerk, the whites-only Calvinist church in South Africa
• Algemene Periodieke Keuring, the vehicle inspection in The Netherlands
• Amplitude shift keying, see Amplitude and phase-shift keying
• Apopka High School, see Apopka High School
• Arbetarpartiet Kommunisterna, see Communist Party of Sweden (1995)
• Arbejderpartiet Kommunisterne, see Workers' Communist Party (Denmark)

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