Admiral Nicholson may refer to:
Douglas Nicholson (1867–1946), British Royal Navy admiral Gresham Nicholson (1892–1975), British Royal Navy admiral Henry Nicholson (Royal Navy officer) (1835–1914), British Royal Navy admiral James W. Nicholson (1821–1887), U.S. Navy rear admiral Reginald F. Nicholson (1852–1939), U.S. Navy rear admiral William Nicholson (Royal Navy officer) (1863–1932), British Royal Navy admiral Wilmot Nicholson (1872–1947), British Royal Navy admiral
See also John B. Nicolson (1783–1846), U.S. Navy commodore, equivalent rank during this era