John Joseph Gregory McGirr (11 October 1879 – 23 March 1949) was an Australian politician who served in the New South Wales Legislative Assembly from 1913 to 1925, representing the Labor Party.

[1] McGirr opened chemist shops at Parkes, Peak Hill, Orange, Narromine, and eventually Sydney.

[3] McGirr won a seat at the 1922 election,[4] at the expense of Michael Burke, who was popular within the Labor Party.

His leadership was brief however as in April 1923 the Federal Executive intervened in the NSW branch and Bill Dunn was appointed interim leader, pending a caucus vote.

He was defeated at the 1925 election and subsequently concentrated on his business interests, except for an unsuccessful attempt to win Calare for the State (Hughes-Evans) Labor Party in September 1940.

[2] One of his daughters, Trixie, moved to Britain where she became a Conservative politician and is the only Australian woman to date to have been made a life peer as the Baroness Gardner of Parkes.