List of ironclad warships of the Ottoman Empire

In the 1860s and 1870s, the Ottoman Navy ordered or acquired a series of ironclad warships, built almost entirely in foreign shipyards. The first class, the four Osmaniye-class ironclads, were ordered from British shipyards in the early 1860s, and a fifth ship, Fatih, was ordered in 1864; this vessel was purchased by the Prussian Navy in 1867. That year the Ottomans ordered the ironclad Feth-i Bülend and the two-ship Avnillah class, all from Britain. In the meantime, the Eyalet of Egypt, a province of the Ottoman Empire, placed orders for several ironclads from French shipyards; these included Asar-i Tevfik and the Asar-i Şevket and Lütf-ü Celil classes. They also awarded the contract for Iclaliye to an Austro-Hungarian firm. Egyptian efforts to assert their independence angered Sultan Abdülaziz, who demanded Egypt surrender all of the ironclads it had ordered, which it did in 1868. By this time, a second Feth-i Bülend-class ironclad had been ordered; this ship, Mukaddeme-i Hayir, was the first ironclad built in the Ottoman Imperial Arsenal. In 1871, the Ottomans ordered two Mesudiye-class ironclads from Britain, the second of which was purchased by the Royal Navy in 1878 in the midst of a war scare with Russia, and laid down a third vessel, Hamidiye, at the Imperial Arsenal. Two final ships, the Peyk-i Şeref class, were ordered from Britain in 1874, but the Royal Navy bought both vessels during the 1878 war scare.

Most of the Ottoman ironclads saw action during the Russo-Turkish War of 1877–1878, with the exception of the four Osmaniyes, which the Ottoman command considered too large and too valuable to risk. The rest of the ships served in the Black Sea, where they supported Ottoman forces in the Caucasus and in the eastern Balkans. One vessel, Lütf-ü Celil, was sunk by Russian artillery while patrolling the Danube. The Ottoman fleet was laid up from the end of the war until 1897, when the government attempted to mobilize the ships during the Greco-Turkish War. After two decades of neglect, most of the ships were found to be unseaworthy, and those vessels that could put to sea were operated by untrained crews who could not effectively operate them. The navy embarked on a major reconstruction program aimed at modernizing the ironclads over the following decade, and many of the vessels were rebuilt or broken up.

Despite having been recently modernized, the Ottoman fleet was in no condition to challenge the powerful Italian fleet during the Italo-Turkish War of 1911–1912, and the bulk of the Ottoman fleet remained in port. Italian cruisers sank one rebuilt ironclad, Avnillah, in the Battle of Beirut. In the First Balkan War, which broke out before the war with Italy ended, a Greek torpedo boat sank Feth-i Bülend in Salonika. In 1913, Asar-i Tevfik ran aground off the coast of Bulgaria; wave action coupled with Bulgarian artillery fire destroyed the ship. Mesudiye took part in two major naval actions against the Greek fleet, the Battle of Elli in December 1912 and the Battle of Lemnos in January 1913, both of which were Ottoman defeats. By the outbreak of World War I in 1914, only Mesudiye served in an active capacity; the other surviving vessels had been reduced to secondary roles like training ships and floating barracks. In December 1914, Mesudiye was sunk by a British submarine in the Dardanelles. After the chaos of the Greco-Turkish War of 1919–1922 subsided, the fleet discarded the ironclads remaining in inventory. The last vessel, Muin-i Zafer, which had been converted into a depot ship for submarines, was scrapped in 1932.