Sir John Charles Samuel Grenier (16 June 1840 - 31 October 1892) was a barrister and the 17th Attorney General of Ceylon.
He was appointed on 30 September 1886, succeeding Francis Fleming, and held the office until his death in 1892.
[2][3] He started his career as a sub-editor on the Ceylon Examiner and later first secretary of the Colombo Municipality.
[3] He was called to the Ceylon Bar in 1864 and started his legal career acting as a Puisne Judge on the Supreme Court Bench.
[3] Grenier died in Colombo, Ceylon on 31 October 1892 from pneumonia aged 52.