Otto Torgersen (16 June 1910 - 12 December 2000) was a Norwegian architect and advertising executive.

Torgersen was born in Trondheim, Norway. He studied advertising and architecture at Goldsmiths, University of London (1937-38). In 1947, he founded an advertisement and architectural firm, Pran og Torgersen AS, which he operated jointly in partnership with Christian Pran, who died in 1961.

Among his architectural designs were

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