 Osborn died at his then home, 720 Park Avenue in New York City, on January 3, 1951.After a funeral at the Brick Presbyterian Church on the Upper East Side (which was attended by John D. Rockefeller Jr., Archibald Roosevelt, Bayard Dodge, Henry Sturgis Morgan, Junius S. Morgan, Frederick H. Ecker, and John F. Curry among others), he was buried at Saint Philip's Church Cemetery in Garrison.In 1939, he received a gold medal from the National Institute of Social Sciences for "distinguished services to humanity."