Tsakopoulos was born in
Rizes, a small village in
Arcadia,
Greece. He arrived in the
United States in 1951, lived for a while in
Chicago, Illinois, and eventually settled in
Sacramento, California. His older brother,
George, came to the United States in 1955 after being wounded in the
Greek Civil War. He later also became a major investor with his brother in Sacramento real estate. Tsakopoulos founded AKT Development Inc. in 1964 when the company made its first real estate sale. The business controls 47,000 acres around Sacramento. Tsakopoulos' daughter,
Eleni Kounalakis, was president of AKT Development until 2010. She is married to journalist and scholar
Markos Kounalakis. Eleni served as
United States Ambassador to Hungary from 2010 to 2013 and is the
Lieutenant Governor of California. Angelo's daughter, Chrysa Tsakopoulos, is married to
George Demos, a former
United States Securities and Exchange Commission prosecutor and Congressional candidate. Angelo's son, Kyriakos Tsakopoulos, is the current co-chairman and president of AKT Development and a former alumni trustee of
Columbia University. In 2006, Angelo and
Eleni provided uncoordinated financial support via a nominally independent organization for then-
California State Treasurer Phil Angelides in his unsuccessful campaign for
Governor of California. In 2015, Angelo and his wife Sofia donated nearly 33 acres of vacant land valued at more than $10 million to San Francisco-based Dignity Health to increase access to health care services in the greater Sacramento area. ==Clean Water Act violation==