William Rabb Beatty (June 11, 1851 – February 8, 1905) was an Ontario businessman and political figure.
He represented Parry Sound in the Legislative Assembly of Ontario as a Liberal-Patrons of Industry member from 1894 to 1898 and as a Liberal from 1898 to 1902.
He was the manager for the Beatty Line, a steamship company operating on the Great Lakes.
His brother Walter Beatty also served in the provincial assembly.
This article about an Ontario Liberal Party MPP is a stub.