Alphaeus Patterson (March 15, 1856 – November 4, 1931) was a politician and businessman from Alberta, Canada.

The company was primarily responsible for developing the site on Bear Creek that became modern Grande Prairie.

He ran in a hotly three-way contested race defeating former Member of the Legislative Assembly (MLA), William Bredin, and against his former business partner and future MLA,William Rae.

He served one term in the Assembly as a member of the official opposition and did not run for re-election.

Imperial Order of the Daughters of the Empire - Alphaeus Patterson chapter which operated in Grande Prairie from 1921 to 1997 was named in his honor.