Christian Brothers' High School, Lewisham (also known as CBHS Lewisham), is a private Roman Catholic comprehensive single-sex secondary day school for boys, located in Lewisham, an inner-western suburb of Sydney, New South Wales, Australia.

[1] The following individuals have served as Principal of Christian Brothers' High School, Lewisham: The school motto Conanti Corona, translates as "A crown to the one who strives", which is used as an expression to help students to try their best in all aspects of life.

The school crest is adapted from the Christian Brothers’ crest, highlighting the Celtic Cross and the Irish heritage of the Christian Brothers.

The crest also contains the two symbols for the first and last letters of the Latin alphabet, symbolising learning and knowledge.

[3] Alumni of Christian Brothers' High School, Lewisham are traditionally known as the "Old Boys".