Jaakko Veikko Emanuel Pöyry (August 6, 1924 in Sodankylä – September 8, 2006 in Helsinki) was a Finnish industrialist.
He founded Pöyry (OMX: POY1V) and personally oversaw its growth from a small engineering office to a global consulting and engineering firm focusing on the energy, forest industry and infrastructure and environment sectors.
It changed its name from Jaakko Pöyry Group in 2006.