Donald R. Kojis (born July 15, 1939 in Milwaukee, Wisconsin) was a professional basketball player who attended Marquette University and was drafted by the Chicago Packers in the 2nd round (12th pick) of the 1961 NBA Draft. He played Forward for the Baltimore Bullets (1963-64), Detroit Pistons (1964-66), Chicago Bulls (1966-67), San Diego Rockets (1967-70), Seattle SuperSonics (1970-72) and Kansas City-Omaha Kings (1972-75).

He was named to the 1968 and 1969 NBA West All-Star Teams.

He holds the Pistons' record for most Field Goal Attempts Per 48 Minutes (25.35).

In 12 seasons he played in 814 Games, had 19,241 Minutes Played, 3,947 Field Goals Made, 8,853 Field Goals Attempted, .446 Field Goal Percentage, 2,054 Free Throws Made, 2,853 Free Throws Attempted, .720 Free Throw Percentage, 4,555 Rebounds, 1,112 Assists, 1,937 Personal Fouls and 9,948 Points.

He played for the United States men's national basketball team at the 1963 FIBA World Championship.

Kojis resides in the San Diego County community of Julian, California as the Director of Whispering Winds Catholic Conference Center.