| Ivan Dérer | |
| Office: | Minister of Justice of Czechoslovakia |
| Term Start: | 14 February 1934 |
| Term End: | 22 September 1938 |
| Office2: | Minister of Education of Czechoslovakia |
| Term Start2: | 7 December 1929 |
| Term End2: | 14 February 1934 |
| Birth Date: | 2 March 1884 |
| Birth Place: | Malacka,, Pozsony County, Kingdom of Hungary (now Malacky, Slovakia) |
| Death Place: | Prague, Czechoslovakia (now Czech Republic) |
| Alma Mater: | Budapest University |
Ivan Dérer (2 March 1884 in Malacka, Kingdom of Hungary – 10 March 1973 in Prague, Czechoslovakia) was a prominent Slovak politician, lawyer, journalist and regional chairman of the Czechoslovak Social Democratic Workers' Party in Slovakia. Serving in 1920 as Minister for Administration of Slovakia, in 1939 to 1934 as Minister of Education and from 1934 to 1938 as Minister of Justice.[1] [2] He was one of the signers of Martin Declaration in 1918. His son, Vladimir Derer was a prominent British Labour Party activist who founded the influential Campaign for Labour Party Democracy.