After the Civil War, Irwin was assigned to special duty at Philadelphia from 1866 to 1867 and was promoted to commander on 25 July 1866. He then returned to sea, serving in the North Atlantic Squadron from 1868 to 1871, in command successively of the steamerUSS New Berne in 1868, the steamer USS Gettysburg from 1868 to 1870, and the screwgunboatUSS Yantic from 1870 to 1871.[3][4]
Irwin then began a lengthy series of shore tours, beginning with an assignment at Mare Island Navy Yard in Vallejo, California, from 1879 to 1883, followed by special duty in 1884 and a tour as president of the Board of Inspection, California, from 1884 to 1888, during which he was promoted to commodore on 4 March 1886. He was idle, awaiting orders, from 13 December 1889 to 12 July 1890, when he assumed duties as a member of the Board of Inspection and Survey. He was promoted to rear admiral on 19 May 1891.[4][5]
Departing the board in June 1891, Irwin finally returned to sea when he assumed command of the Asiatic Squadron on 7 June 1891.[6] He arrived in Honolulu, Hawaii, suddenly and unexpectedly on 6 November 1893 to replace Commodore Joseph S. Skerrett there as commander-in-chief of the Pacific Squadron; Skerrett traded places with Irwin, taking command of the Asiatic Squadron. Irwin soon became involved in the "Black Week" crisis of December 1893 – January 1894, during which war nearly broke out between the United States and the Provisional Government of Hawaii.[7]
Irwin was placed on the retired list on 15 April 1894 upon reaching the mandatory retirement age of 62.[4][6] He hauled down his flag for the final time aboard the protected cruiserUSS Philadelphia at Honolulu the following day.[2]
In retirement, Irwin resided in Washington, D.C., where he died at his home late on the evening of 28 July 1901 after an illness of several months. He left behind his wife, a daughter, and a son, also named John Irwin, who at the time was paymaster aboard the training ship USS Essex.[8] Irwin was interred at Arlington National Cemetery with full naval honors on 31 July 1901.[9][10]
Gallery
Irwin aboard USS Lancaster at Yokohama, Japan in 1893.
Sketch of Irwin in the Kentucky New Era, June 1, 1894.