James Pitt Mabee (November 5, 1859 – May 6, 1912) was a Canadian lawyer, judge, and railway commissioner.

[1] Born in Port Rowan, Canada West, Mabee studied at University of Toronto and Osgoode Hall before being called to the Bar in 1882.

A lawyer, he ran unsuccessfully as the Liberal Party of Canada candidate against Alexander Ferguson MacLaren in the riding of Perth North in the Federal election of 1904.

Later in 1905, he resigned when he was appointed the chancery division of the Ontario Superior Court of Justice.

In 1908. he was appointed head of the Board of Railway Commissioners succeeding Albert Clements Killam.