The list of ironclads includes all steam-propelled warship (supplemented with sails in various cases) and protected by iron or steel armor plates that were built in the early part of the second half of the 19th century, between 1859 and the early 1890s.
The list includes ironclads of two different categories or roles, oceanic and coastal (the latter may be floating batteries, monitors and coastal defence ships).
The various ironclads design such as the ram, broadside, central battery (or casemate), turret and barbette will be mentioned.
Wooden hull ships that have been subsequently armored will also be considered in this list.
Although the introduction of the ironclad is clear-cut, the boundary between 'ironclad' and the later 'pre-dreadnought battleship' is less obvious, as the characteristics of the pre-dreadnought evolved from 1875 to 1895.