| István Ládai | |
| Order: | People's Commissar of Justice of Hungary |
| Term Start: | 21 March 1919 |
| Term End: | 24 June 1919 |
| Predecessor: | Sándor Juhász Nagy |
| Successor: | Zoltán Rónai |
| Birth Date: | 14 May 1873 |
| Birth Place: | Kecskemét, Austria-Hungary |
| Death Date: | 1920s |
| Death Place: | Bucharest, Kingdom of Romania |
| Profession: | politician, jurist |
István Ládai (Láday; 14 May 1873 - 15 April 1936) was a Hungarian politician and jurist, who served as People's Commissar of Justice in 1919 during the Hungarian Soviet Republic.