Sir Oswald Victor Cheung CBE QC SC JP (Chinese: 張奧偉; 22 January 1922 – 10 December 2003) was a barrister in Hong Kong, known as the "doyen of the bar".

Born in Hong Kong in 1922, Cheung was brought up in the territory, and was educated at the Diocesan Boys' School, where he graduated in 1938.

From 1938 to 1941, he read natural sciences at the University of Hong Kong, and received a degree in mathematics and chemistry upon his graduation.

He moved to Calcutta in 1945, and in 1947, after the war ended, he received a scholarship to study a Master's in Law at University College, Oxford.

Non-government roles included member of the Hong Kong Policy Committee on the Christian Children's Fund (1960-1964).