Ernest (Ernie) DiGregorio (born January 15 1951, in North Providence, Rhode Island) is an American former National Basketball Association player.

After playing for the Providence College Friars, DiGregorio was drafted by the Kentucky Colonels of the American Basketball Association but opted instead for the NBA. He was selected third overall by the Buffalo Braves in the 1973 NBA Draft out of Providence College, and won the NBA Rookie of the Year Award in 1973-1974 after averaging 15.2 points and leading the league in both free throw percentage and assists per game. DiGregorio still holds the NBA rookie record for assists in a single game with 25 (a record now shared with Nate McMillan).

He would never again come close to that level of production, but managed to have a decent NBA career, most of which he spent with the Braves. During the 1976-1977 season, DiGregorio led the league in free throw percentage a second time, with a then-NBA record 94.5%. After playing 27 games with the Braves in the 1977-1978 season, he was traded to the Los Angeles Lakers, but DiGregorio played in a Lakers uniform in only 25 games before being waived. The Boston Celtics signed him as a free agent but he played only sparingly for the rest of the season. He would not play in the NBA again, although he did not formally retire until 1981.

He now works as a celebrity host at Foxwoods Resort Casino in Ledyard, Connecticut and attends all Celtics home games.