William Addison Adamson (27 May 1858 - 10 June 1924) was an Australian politician.
Adamson was born in South Yarra to seedsman William Adamson and Isabella Bruce. He attended Brighton Grammar School and became a grain merchant. On 9 June 1880 he married Lucy Jackson, with whom he had five children. From 1889 he worked as a stock and station agent, and he served on Brighton City Council from 1897 to 1913, with a term as mayor from 1901 to 1902. In 1910, he was elected to the Victorian Legislative Council for South Eastern Province. A Liberal, he was a minister without portfolio from 1913 to 1915 and Minister of Public Works from 1915 to 1917. Adamson retired from politics in 1922, and died in Brighton in 1924.[1]