Sir John Chalker Crosbie KBE (11 September 1876 – 5 October 1932) was a Newfoundland merchant and politician.

An aggressive and energetic entrepreneur, he created a fortune (which he lost) and started the Crosbie dynasty.

His son, Chesley Crosbie,[1] and grandson, John Crosbie[2] were both affluent politicians.

He entered politics as MHA for Bay de Verde in 1908.

After Edward Morris resigned at the end of 1917, Crosbie served as Prime Minister in a caretaker capacity until 5 January 1918, when William Lloyd took office.