Sir Richard Stuart Lake, KCMG (July 10, 1860 – April 23, 1950) was an English-born Canadian territorial provincial and federal level politician from Saskatchewan, Canada.

In 1900 he vacated his seat to run in Assiniboia East in the 1900 Canadian federal election.

After being defeated in his first attempt at federal politics he ran for his old seat and was re-elected as the MLA in a by-election on March 22, 1901.

He served for six years, until February 17, 1921, when he was offered the possibility of extending his royal commission; however, he refused.

He moved to Victoria, British Columbia after his career in politics and lived the rest of his life there.