Joseph Gillis Biggar (c. 1828 – 19 February 1890), commonly known as Joe Biggar or J. G. Biggar, was an Irish nationalist politician from Belfast. He served as an MP in the House of Commons of the United Kingdom of Great Britain and Ireland as member of the Home Rule League and later Irish Parliamentary Party for Cavan from 1874 to 1885 and West Cavan from 1885 to his death in 1890.