He played 11 of his 13 NBA seasons with Atlanta and was a six-time All-Star. In 890 games, he averaged 20.2 points, 4.4 rebounds and 2.7 assists.
After his NBA carer ended in 1979, Hudson worked briefly for the Hawks before moving to Park City. He became a real estate investor and member of the city council.
Hudson coached in a recreational basketball league he created for more than 20 years. He suffered a stroke on a Park City ski slope in 2005.
Hudson is one of three former Atlanta players who had their number retired by the organization. The others are Bob Pettit and Dominique Wilkins.
In a statement, Hawks co-owner Michael Gearon said, "Lou Hudson holds a special place in the Hawks family, in the hearts of our fans and in the history of our club. As a fan growing up with this team, I'm fortunate to say I was able to see almost every game Sweet Lou played as a member of the Hawks.
"He was an integral part of successful Hawks teams for over a decade and is deservedly recognized with the ultimate symbol of his significance to the franchise with the No. 23 hanging inside Philips Arena. On behalf of the Hawks organization, I'd like to extend condolences to Lou's family and friends."