Harold W. Luhnow (September 25, 1895 – August 1978) was an American businessman, philanthropist, and political activist. He is most well known for his management of the influential William Volker Fund during the period between 1947 and 1964 in the United States. A staunch anti-New Deal conservative,[1] Luhnow and a dedicated group of staffers directed the fund to support libertarian and conservative intellectuals and academics.