| César Ruíz Danyau | |
| Birth Date: | 1918 10, df=y |
| Birth Place: | Angol, Chile |
| Death Place: | Santiago, Chile |
| Office: | Designed Senator |
| Term Start: | 11 March 1990 |
| Term End: | 21 November 1990 |
| Office1: | Ambassador of Chile to Japan |
| President1: | Augusto Pinochet |
| Term Start1: | 1979 |
| Term End1: | 1982 |
| Predecessor1: | Jacobo Neumann |
| Successor1: | Eduardo Bravo |
| Office2: | Head of the University of Chile |
| Appointer2: | Augusto Pinochet |
| Term Start2: | 3 October 1973 |
| Term End2: | 24 July 1974 |
| Predecessor2: | Edgardo Boeninger |
| Successor2: | Agustín Rodríguez |
| Office3: | Minister of Public Works |
| President3: | Salvador Allende |
| Term Start3: | 9 August 1973 |
| Term End3: | 18 August 1973 |
| Predecessor3: | Humberto Mardones |
| Successor3: | Humberto Magliochetti |
| Office4: | Commanders-in-chief of the Chilean Air Force |
| Term Start4: | 1970 |
| Term End4: | 17 August 1973 |
| Predecessor4: | Carlos Guerraty |
| Successor4: | Gustavo Leigh |
| Occupation: | Diplomatic, Politician |
| Profession: | Militar |
| Alma Mater: | Bernardo O'Higgins Military Academy |
César Ruíz Danyau (born 26 October 1918 – 21 November 1990) was a Chilean Army general.[1] [2]