AP may stand for:

• Associated Press News Agency
• The Advanced Placement Program for high school students
• Andhra Pradesh, the Indian state
• AP, the state code for correspondence to United States Armed Forces personnel in the Pacific Ocean
• the US Navy hull classification symbol for Transport
• An access point, similar to a hub used in Ethernet networking, but using wireless technologies.
• Acetone peroxide, a high explosive
• Amiga Power, a computer magazine for Amiga games