The Act of Union was passed in 1800 and came into force on 1 January 1801. The Irish parliament was abolished and henceforth Irish MPs represented their constituents at Westminster. During the debates associated with this petitions both for and against the Act of Union were drawn up across Ireland.

Some of these petitions were county-based, while others were from parishes or manors. Several were published in the Belfast Newsletter in 1799-1800. This petition from the Roman Catholic inhabitants of Lower Creggan was published on 17 January 1800. It was signed by 460 individuals.

The published introduction to the petition is as follows:

We the Roman Catholic Inhabitants of the Parish of Lower Cregan [sic], in the County of Armagh, do hereby declare our wishes for a Legislative Union with Great Britain upon fair and liberal Principles, and hope our Representatives in Parliament will take it into serious consideration.

The Catholic parish of Lower Creggan was formed in 1795 from the northern portion of the parish of Creggan.