He is a member of the military order of the Loyal Legion of the United States, and for some time he held the office of vice-commander of the Washington branch, being subsequently made grand commander. In the summer of 1896, he represented the American navy at the jubilee of Queen Victoria. On September 3, 1868, Rear-Admiral Cook married IMiss Carrie Earle, of San Francisco, California. They have two sons, both in the navy.