Joanna Ayela Aleh (born 15 May 1986) is a New Zealand sailor.
She is a national champion, a former world champion, and an Olympic gold medallist.
Aleh competes in the two-woman 470 dinghy, a double-handed monohull planing dinghy with a centreboard, Bermuda rig, centre sheeting and length overall of 4.70 metres.