County Sligo was divided into 3 local electoral areas (LEAs) to elect councillors for a five-year term of office on the electoral system of proportional representation by means of the single transferable vote (PR-STV).

At the 2014 Sligo County Council election, County Sligo was divided into two local electoral areas, both of which breached upper limit of 7 seats in the terms of reference of the 2018 LEA boundary review.

[1][2] A total of 35 candidates contested the county's 18 seats,[3] of whom fifteen were outgoing councillors.

The nine independent candidates included Declan Bree, who was County Sligo's longest serving councillor.

[9] The ensuing Garda investigation into potential electoral fraud was still ongoing in February 2022.