Donald Cripps (USA, b. 12 September 1929) parachuted off the 267 m high (876-ft) New River Gorge Bridge near Fayetteville in West Virginia, USA, on 19 October 2013, aged 84 years 37 days.
Jim Guyer was possibly the oldest active jumper making jumps well into his 70's I believe. I don't think he started until pretty late in age too. He is one tough SOB!
Well not the least youngest jumper ever then but here's my friend Jerry Balint making his first BASE jump at age 81. He performed well and wants to make more jumps!