Thomas James Macnamara PC (23 August 1861 – 3 December 1931) was a British teacher, educationalist and radical Liberal politician.

[1] Macnamara was born in Montreal, Quebec, Canada, the son of a soldier originally from County Clare in Ireland.

He was sometime chairman of the London School Board and in 1896 he was appointed president of the National Union of Teachers.

In 1920 Lloyd George appointed him Minister of Labour, with a seat in the cabinet, a position he retained until the government fell in October 1922.

At the 1924 General Election she stood as Liberal candidate for Southwark South East, finishing third.