Alwyn Jones may refer to:

• Alwyn Jones (biophysicist) (born 1947), Welsh biophysicist and professor at the University of Uppsala
• Alwyn Jones (athlete) (born 1985), Australian triple jumper
• Alwyn Rice Jones (1934–2007), Archbishop of Wales, 1991–1999

• Acting President of Pakistan
• Acting President of the Russian Federation
• Acting rank
• Acting sergeant
• Acting Sergeant
• Acting Serjeant
• Acting Squadron Leader
• Acting Staff Sergeant
• Acting Staff Serjeant
• Acting sub-lieutenant
• Acting Sub Lieutenant
• Acting Superintendent's Headquarters
• Acting troop
• Acting troupe
• Acting Up
• Acting Warrant Officer Class 2
• Acting Warrant Officer Class I
• Acting Warrant Officer Class II
• Acting Wing Commander
• Acting Witan of Mercia
• Actinia
• Actinia aurora
• Actinia bermudensis
• Actinia cari
• Actinia mediterranea