| Pierre Blanchy | |
| Office: | Acting Minister of State of Monaco |
| Monarch1: | Rainier III |
| Term Start1: | 23 January 1962 |
| Term End1: | 16 August 1963 |
| Predecessor1: | Émile Pelletier |
| Successor1: | Jean Reymond |
| Monarch2: | Louis II Rainier III |
| Term Start2: | 4 January 1949 |
| Term End2: | 12 July 1949 |
| Predecessor2: | Pierre de Witasse |
| Successor2: | Jacques Rueff |
| Monarch3: | Louis II |
| Term Start3: | 29 September 1944 |
| Term End3: | 13 October 1944 |
| Predecessor3: | Emile Roblot |
| Successor3: | Pierre de Witasse |
| Birth Date: | 1897 |
| Death Date: | 1981 (aged 84) |
| Party: | Independent |
Pierre Blanchy (1897 – 1981) was a French politician, who served as acting Minister of State for Monaco three times between 1944 and 1963, serving under the monarchy of both Rainier III and Louis II.[1] He was succeeded by Jean Reymond for the final time in 1963 after dedicated service of nearly 20 years.[2]