Names
- Philippine War Relief of the United States.1
- Pittman, Key, 1872-1940.1
- Poindexter, Miles, 1868-1946.1
- Polk, Frank L. (Frank Lyon), 1871-1943.1
- Polk, Frank Lyon, 1871-1943.1
- Pollock, James Kerr, 1898-1
- Port Huron Gas Light Company.1
- Porter, Russell B.1
- Potter, Charles E. (Charles Edward), 1916-1979.1
- Powers, Perry Francis, 1857-1945.1
- Pressman, Lee.1
- Progressive Party (1912)1
- Ramos, Alfredo.1
- Reed, Stanley F.1
- Reuther, Walter, 1907-1970.1
- Rich, John Treadway, 1841-1926.1
- Rivers, William Cannon, 1866-1943.1
- Roberts, Owen J. (Owen Josephus), 1875-1955.1
- Rogge, O. John (Oetje John), 1903-1981.1
- Roosevelt, Dorothy Kemp, 1899-1985.1