| Honorific-Prefix: | Senator |
| C. Coomaraswamy | |
| Native Name: | செ. குமாரசுவாமி |
| Native Name Lang: | ta |
| Honorific-Suffix: | CCS |
| Office1: | Member of the Senate of Ceylon |
| Office2: | Ceylonese High Commissioner to India |
| Term Start2: | 1950 |
| Term End2: | 1955 |
| Predecessor2: | A. Mahadeva |
| Birth Date: | 25 August 1887 |
| Alma Mater: | Jaffna Hindu College Royal College, Colombo |
| Profession: | Civil servant |
| Blank1: | Ethnicity |
| Data1: | Ceylon Tamil |
Chellappah Coomaraswamy CBE (Tamil: செல்லப்பா குமாரசுவாமி; born 25 August 1887) was a Ceylon Tamil civil servant, diplomat and member of the Senate of Ceylon.
Coomaraswamy was born on 25 August 1887.[1] He was the son of Chellappah from Aiyanarkoviladi.[1] Coomaraswamy was educated at Jaffna Hindu College and Royal College, Colombo.[1]
Coomaraswamy married Mankayatkarasi, daughter of Mudaliyar Sabapathy and Manicka Ammaiyar from Nallur.[1] They had three sons (Rajendra, Mahendra and Satyendra) and one daughter (Sundareswari).[1]
Coomaraswamy joined the Government Clerical Service after finishing his education.[1] He was appointed to the civil service in 1910.[1] He was Police Magistrate in Puttalam in 1913, District Judge and Registrar General.[1] He served as District Judge in Jaffna in 1933 before becoming Government Agent for the Northern Province.[1]
After retirement Coomaraswamy was nominated to the Senate of Ceylon in 1947.[1] [2] [3] He served as the Ceylonese High Commissioner in New Delhi between 1950 and 1955.[4]