Sir Herbert Henry Couzens KBE (16 October 1877 – 17 November 1944) was a British electrical engineering executive who managed public utilities in England, Canada, and Brazil.

He was instrumental in guiding the early development and expansion of the publicly owned electric network in Toronto.

He managed the integration of the different streetcar networks into one unified system, and oversaw the extensive rebuilding and reequipping of the TTC that took place throughout the early 1920s.

Couzens resigned his positions as general manager of Toronto Hydro and of the TTC in 1924, and joined the Brazilian Traction, Light and Power Co., a Canadian-owned utility based in Brazil, with extensive holdings in South America, and later became vice-president of the company.

In 1937 he moved from Rio de Janeiro to England to work for the firm, and was knighted that same year.