| Birth Name: | Denis Claire Baudouin Mesritz |
| Birth Date: | 16 November 1919 |
| Birth Place: | The Hague, Netherlands |
| Death Place: | Rathenow Concentration Camp, Germany |
| Allegiance: | Netherlands |
| Branch: | Dutch resistance |
| Serviceyears: | 1940–1945 |
| Awards: | Dutch Cross of Resistance |
| Otherwork: | lawyer |
| Alma Mater: | University of Groningen |
Denis Claire Baudouin Mesritz (November 16, 1919 – March 16, 1945) was a Dutch lawyer. He studied law at the University of Groningen until 1942. Jean Mesritz was his brother.
Mesritz was born in The Hague. During the Second World War, Mesritz was active in the resistance. He was the founder of the underground newspaper De Toekomst “The Future” as well as being involved in “De Geus”, “Het Parool” and “Ons Volk”.[1] In addition, he was an initiator of what would become the National Resistance Committee. On May 16, 1944, he was arrested by the Germans on the Amsterdam-Hague train. He died at the age of 25 in the concentration camp in Rathenow[2] and is buried at Ereveld Loenen.[3]
He was posthumously awarded the Dutch Cross of Resistance.[3]