Michael Spencer Greco (born November 22, 1942 in Rende, Italy) is an American lawyer who served as President of the American Bar Association (2005–2006). He is a retired partner in the Boston office of K&L Gates, and a former partner at the now-defunct Hill and Barlow. He was a partner with Hill and Barlow from 1973 to 2002 and was a partner with K&L Gates from 2003 to 2017.