| Honorific-Prefix: | The Honourable |
| Sir Geoffrey Cator | |
| Honorific-Suffix: | CMG |
| Order: | 19th British Resident of Perak |
| Term Start: | 1933 |
| Term End: | 1939 |
| Predecessor: | Bertram Walter Elles |
| Successor: | Marcus Rex |
| Order2: | 2nd British Resident of Labuan |
| Term Start2: | February 1917 |
| Term End2: | 1918 |
| Predecessor2: | Malcolm McArthur |
| Successor2: | unknown |
| Order1: | 15th British Resident of Selangor |
| Term Start1: | July 1932 |
| Term End1: | 1933 |
| Predecessor1: | James Lornie |
| Successor1: | George Ernest London |
| Office3: | 6th British Resident to Brunei |
| Term Start3: | 1916 |
| Term End3: | 1921 |
| Predecessor3: | Ernest Barton Maundrell |
| Successor3: | Lucien Allen Arthur |
| Birth Date: | 14 August 1884 |
| Birth Place: | Lacock, Wiltshire, England |
| Death Place: | Hindhead, Surrey, England[1] |
| Father: | Robert Cator |
| Mother: | Evelyn Susan Sotheron Estcourt |
| Occupation: | Colonial administrator |
Sir Geoffrey Edmund Cator (14 August 1884 – 21 April 1973)[2] was a British administrator in the Malayan Civil Service.
Cator was born in Lacock, Wiltshire,[3] the son of brewer Robert Cator of Bath and Evelyn Susan Sotheron Estcourt.[2] [4] He married Elizabeth Margaret Wynne Mostyn in 1922; they had a son, Peter John Cator (26 October 1924 – 22 January 2006) and daughter Rosemary Ann Cator.[2] Initially assigned to Kuala Kangsar, he held the position of Collector of Land Revenue and frequently participated in football games with the Malay College students, a sport he possessed some skill in.[5] Sir Geoffrey joined the Malayan Civil Service in 1907 until 1939. He was the British Resident of Brunei from May 1916 until March 1921. Later he was posted as the Superintendent of Government Monopolies of Straits Settlements, the District Officer of Klang and also member of the Legislative Council of Federated Malay States. He was the British Resident of Selangor (1932-1933) and British Resident of Perak (1933-1939). His last post was the head of the Malay States Information Agency in London. He was made a Knight Bachelor in the 1946 New Year Honours. He had previously been awarded the CMG in 1936.
1948 saw his retirement as a Malayan Agent. One of his responsibilities in that position was to see Sybil Kathigasu in the hospital following the Second World War; he accomplished this duty and did so with his wife, Lizzy. Using modern medicine, especially quinine, to combat malaria was one of his main concerns while he was in Perak. He died in England, 1973.
During the World War II, Sir Geoffrey also responsible for planning the war strategy, initially he published some written reviews, when Malaya was ambushed by the Japanese. His publications were,