| Honorific-Prefix: | Sir |
| Thiruvalayangudi Vijayaraghavacharya | |
| Honorific-Suffix: | KBE |
| Office1: | Diwan of Udaipur |
| Term Start1: | 1939 |
| Term End1: | 1947 |
| Monarch1: | Bhupal Singh |
| Office2: | Diwan of Cochin |
| Term Start2: | 1919 |
| Term End2: | 1922 |
| Monarch2: | Rama Varma XVI |
| Predecessor2: | J. W. Bhore |
| Successor2: | P. Narayana Menon |
| Birth Date: | 1875 8, df=yes |
| Birth Place: | Karur, Madras Presidency |
| Death Place: | Madras, India |
Diwan Bahadur Sir Thiruvalayangudi Vijayaraghavacharya KBE (27 August 1875 - 28 February 1953) was an Indian civil servant and administrator who served as the Diwan of Cochin kingdom from 1919 to 1922. Vijayaraghavacharya was also a member of the Constituent Assembly of India representing Udaipur.
Vijayaraghavacharya was born in Erode on 27 August 1875 and was educated at the Presidency College, Madras. Vijayaraghavacharya completed his B. A. in 1894 and obtained an M. A. in 1898.
Vijayaraghavacharya joined the provincial civil service in 1898 and served, initially, as a district officer. From 1912 to 1917, he served as Secretary in the Board of Revenue, Madras Corporation and as Deputy Director of Industries from 1918 to 1919. In 1919, he was appointed Diwan of the Cochin kingdom and served from 1919 to 1922.
During his tenure, Vijayaraghavacharya started the industrialization of Cochin kingdom. The Nair Regulation was introduced in 1920. Female literacy increased considerably during this period. Local Self-governing bodies such as village panchayats and municipal councils were given increased powers and privileges.
Vijayaraghavacharya retired from the civil service on 25 December 1935. Four years later, he was appointed Diwan of Udaipur.
Vijayaraghavacharya died on 28 February 1953 at the age of 77.[1] [2]