Sir John Charles Ready Colomb, KCMG (1 May 1838 – 27 May 1909) was a British naval strategist.
Colomb was born in Onchan, Isle of Man, the son of General George Thomas Colomb (1787–1874), and was the younger brother of British Vice-Admiral Philip Howard Colomb. He was educated privately, and entered the Royal Naval College from which he passed in 1854 into the Royal Marine Artillery. After being variously employed with the Navy, Army, Militia, and Volunteers he retired in 1869 with the rank of Captain. He thenceforth devoted himself to the study of naval and military problems, on which he had already published some essays.
His books on Colonial Defence and Colonial Opinions (1873), The Defence of Great and Greater Britain (1879), Naval Intelligence and the Protection of Commerce (1881), The Use and the Application of Marine Forces (1883), Imperial Federation: Naval and Military (1887), followed later by other similar works, made him well known among the rising school of Imperialists, and he was returned to parliament (1886–1892) as Conservative member for Bow and Bromley, and afterwards (1895–1906) for Great Yarmouth.
In 1887 he was created CMG, and in 1888 KCMG. He became a large landowner, when he inherited the Dromquinna estate with 4,500 acres in the barony of Dunkerron South (Kerry, Ireland) from his father-in-law Robert Samuel Palmer. There in the townland of Templenoe outside Kenmare he commissioned the architect James Franklin Fuller around 1890 to build Dromquinna House. Colomb became a member of the Irish privy council in 1903 and in 1906 sat on the Royal Commission dealing with congested districts. He was also a Deputy Lieutenant and a Justice of Peace for the county; and in 1895 served as High Sheriff of Kerry. John Colomb was a member of the Carlton Club (then Pall Mall, today St James's Street, London). Being ill for some time, he died, aged 71, after an operation on 27 May 1909 at his London residence, 75 Belgrave Road.