Massachusetts: Presidents of the Provincial Congress: 1774-1775 Chairman 7 Oct 1774 - 11 Oct 1774 John Hancock [1] President of the Provincial Congress [2] 11 Oct 1774 - 10 Dec 1774 John Hancock (x) 10 Dec 1774 - 1 Feb 1775 dissolution period 1 Feb 1775 - 29 May 1775 John Hancock (x) 29 May 1775 - 31 May 1775 dissolution period 31 May 1775 - 17 Jun 1775 Joseph Warren 17 Jun 1775 - 19 Jun 1775 office vacant 19 Jun 1775 - 19 Jul 1775 James Warren [1] Also in the United States. [2] Also in official use (after 1 Feb 1775): President of the Congress of the Colony of the Massachusetts Bay. Last updated on: 09 Apr 2016 21:00:00; URL: www.archontology.org/nations/us/massachusetts/00_1774_1775_pc.php