| László Mendelényi | |
| Order: | Crown Prosecutor |
| Term Start: | 1944 |
| Term End: | 1944 |
| Predecessor: | Zoltán Timkó |
| Successor: | József Domokos (as Chief Prosecutor) |
| Birth Date: | 1877 2, df=yes |
| Birth Place: | Nyitrazsámbokrét, Austria-Hungary (today: Žabokreky nad Nitrou, Slovakia) |
| Death Date: | 1973 |
| Death Place: | Budapest |
| Profession: | jurist |
Dr. László Mendelényi (7 February 1877 – ?) was a Hungarian jurist, who served as the last Crown Prosecutor of Hungary in 1944.