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| Conrad IV | |
|---|---|
 | |
| King of Germany (formally King of the Romans) King of Italy | |
| Reign | May 1237 – 21 May 1254 |
| Predecessor | Henry (VII) |
| Successor | William |
| King of Sicily | |
| Reign | 13 December 1250 – 21 May 1254 |
| Predecessor | Frederick I |
| Successor | Conrad II |
| King of Jerusalem | |
| Reign | 4 May 1228 – 21 May 1254 |
| Predecessor | Isabella II and Frederick I |
| Successor | Conrad III |
| Regent | Frederick (until 1243), Alice (1243–1246), Henry (1246–1253) and Plaisance (from 1253) |
| Duke of Swabia | |
| Reign | 12 February 1235 – 21 May 1254 |
| Predecessor | Henry |
| Successor | Conrad IV |
| Born | 25 April 1228 Andria, Kingdom of Sicily |
| Died | 21 May 1254 (aged 26) Lavello, Kingdom of Sicily |
| Burial | |
| Spouse | Elisabeth of Bavaria |
| Issue | Conradin |
| House | Hohenstaufen |
| Father | Frederick II, Holy Roman Emperor |
| Mother | Isabella II of Jerusalem |
Conrad (25 April 1228 – 21 May 1254), a member of the Hohenstaufen dynasty, was the only son of Emperor Frederick II from his second marriage with Queen Isabella II of Jerusalem. He inherited the title of King of Jerusalem (as Conrad II) upon the death of his mother in childbed. Appointed Duke of Swabia in 1235, his father had him elected King of Germany (King of the Romans) and crowned King of Italy (as Conrad IV) in 1237. After the emperor was deposed and died in 1250, he ruled as King of Sicily (Conrad I) until his death.