Bertha Wernham Wilson CC FRSC (September 18, 1923 – April 28, 2007) was a Canadian jurist and the first female puisne justice of the Supreme Court of Canada. Before her ascension to Canada's highest court, she was the first female associate and partner at Osler, Hoskin & Harcourt and the first woman appointed to the Court of Appeal for Ontario. During her time at Osler, she created the first in-firm research department in the Canadian legal industry.