Irwin Paul Rothenberg (December 31, 1921 – July 18, 2009) was an American professional basketball player. He played for the Cleveland Rebels, Washington Capitols, Baltimore Bullets, St. Louis Bombers, and New York Knicks of the Basketball Association of America (now known as the National Basketball Association). Rothenberg also played in the American Basketball League for the Philadelphia Sphas, New York Gothams, and Paterson Crescents.

Rothenberg played college basketball at Long Island University where his team qualified for the 1942 NIT.

For the 1944–45 season, Rothenberg played for the Philadelphia Sphas where they won the league title.

For the 1945–46 season, Rothenberg played for the New York Gothams.

For the 1949–50 and 1950–51 seasons, Rothenberg played for the Paterson Crescents.

For the 1946–47 BAA season, Rothenberg played for the Cleveland Rebels.

For the 1947–48 BAA season, Rothenberg played for the Washington Capitols, Baltimore Bullets, and St. Louis Bombers. That season, he led the BAA in games played

For the 1948–49 BAA season, Rothenberg played for the New York Knicks.