Rabinowitz (1887–1957) was an American businessman, philanthropist and art collector.
Born in Lithuania (then part of the Russian Empire), he emigrated to the United States, where he founded a manufacturing company and became a millionaire.
He established endowments at Yale University and the Hebrew University of Jerusalem.
He funded Nelson Glueck's archaeological trips to the Negev of Israel.
His art collection is held posthumously at the Yale University Art Gallery.