| Miguel Cruchaga Tocornal | |
| Birth Date: | 1869 5, df=y |
| Birth Place: | Concepción, Chile |
| Death Place: | Santiago, Chile |
| Nationality: | Chilean |
| Office1: | President of the Senate of Chile |
| Term Start1: | 24 May 1937 |
| Term End1: | 24 May 1941 |
| Predecessor1: | José Maza Fernández |
| Successor1: | Florencio Durán |
| Office2: | Member of the Senate of Chile |
| Constituency2: | 5th Provincial Agrupation (O'Higgins and Colchagua) |
| Term Start2: | 15 May 1945 |
| Term End2: | 15 May 1953 |
| Successor2: | Sergio Fernández Larraín |
| Constituency3: | 23rd Departamental Agrupation (Osorno and Río Negro) |
| Term Start3: | 15 May 1937 |
| Term End3: | 15 May 1945 |
| Office4: | Minister of Foreign Affairs |
| Term Start4: | 24 December 1932 |
| Term End4: | 16 February 1937 |
| Predecessor4: | Jorge Matte Gormaz |
| Successor4: | José Gutiérrez Alliende |
| Office5: | Minister of Interior |
| Term Start5: | 21 October 1905 |
| Term End5: | 19 March 1906 |
| Predecessor5: | Juan Antonio Orrego |
| Successor5: | José Ramón Gutiérrez |
| Office6: | Minister of Finance |
| Term Start6: | 1 September 1903 |
| Term End6: | 10 January 1904 |
| Predecessor6: | Manuel Salinas |
| Successor6: | Ramón E. Santelices |
| Office7: | Member of the Chamber of Deputies of Chile |
| Constituency7: | La Victoria and Melipilla |
| Term Start7: | 15 May 1903 |
| Term End7: | 15 May 1906 |
| Term Start8: | 15 May 1900 |
| Term End8: | 15 May 1903 |
| Party: | Conservative Party |
| Occupation: | Politician |
| Profession: | Lawyer |
| Spouse: | Elvira Matte Gormaz |
| Children: | None |
| Relatives: | Alberto Hurtado (nephew) |
Miguel Cruchaga Tocornal (born 4 May 1869 – 3 May 1949) was a Chilean politician and lawyer who served as President of the Senate of Chile.