586 AD was a year of the Julian calendar.
586 may also refer to:
Computing P5 (microarchitecture) (Pentium, 80586, i586), Intel fifth generation x86 processor architecture, and related: Cyrix 5x86 Nx586, by NexGen, later called AMD 5N86 AMD K5 (5K86, AM586, 5x86)
Other uses 586 (number), a number Minuscule 586 (Gregory-Aland), manuscript of the New Testament Smith & Wesson Model 586, a revolver "5 8 6", a song on the album Power, Corruption & Lies by New Order