Absalom Shade Allan (November 26, 1843 – February 1, 1928) was an Ontario merchant and political figure. He represented Wellington West in the Legislative Assembly of Ontario as a Liberal member from 1886 to 1894. He was born near Preston, Canada West in 1843, the son of Alexander Allan, who came from Aberdeen, Scotland. His uncle Absalom Shade founded Galt. Allan was educated in Preston, Elora and Toronto. He taught school and then worked as a bookkeeper in Elora.