Brash is a surname. Notable people with the surname include:
Alan Brash (1913-2002), leading minister of the Presbyterian Church of Aotearoa New Zealand
Alan Brash (pharmacologist) (born 1949), Scottish pharmacologist
Don Brash (born 1940), former New Zealand politician
Matt Brash, see Zoo Vet at Large
Peter Brash (born 1954), American television soap opera writer
Thomas Brash (1874-1957), leading figure in New Zealand's dairy industry
William W. Brash III, American judge
