John Moore (1763 – 6 December 1799) was an Irishman appointed in August 1798 "President of the Government of the Province of Connacht" by the commander of a French invasion force, General Humbert.

After the Battle of Castlebar which took place on 27 August 1798, General Humbert, on 31 August 1798, issued the following decree, which inter alia appointed John Moore as the President of the Government of the Province of Connacht:[2] Liberty, Equality Head quarters at Castlebar, 14th Fructidor, sixth Year of the French Republic, One and Indivisible.

Hence, strictly speaking, it appears to be incorrect to refer to any formal establishment of a Republic of Connacht or of John Moore being appointed its President.

[3] In September 1798, just weeks after its proclamation, the Irish Royal Army mobilised westwards and the Republic was lost with defeat at the Battle of Ballinamuck.

According to contemporary accounts, the "lenity" of Lord Cornwallis to Moore "and other rebels, gave considerable offence to the violent loyalists".

[4] While being taken to Duncannon Fort in Wexford, en route to New Geneva, he died in the Royal Oak Coaching Inn, Broad Street, Waterford City.