Sir Allan Ross Welsh CMG (8 July 1875 – 1957) was a Rhodesian lawyer and politician.

Welsh was born in Bedford, Eastern Cape to Alexander Robert Welsh, a Presbyterian clergyman from Scotland, and Bertha Solomon, the first woman barrister in South Africa and the first woman member of the South African Parliament.

He passed his final law exams in 1896 and was admitted to the Cape Supreme Court as an attorney and notary.

[4] Welsh was elected in 1927 to the Southern Rhodesian Legislative Assembly as the member for Bulawayo North, replacing Sir Charles Coghlan, who had died in office, and was re-elected several times until 1935.

[12] He was also appointed Grand Commander of the Order of the Phoenix by King Paul of Greece in 1950, in recognition of services rendered during the Second World War.