NIFootball - Extensive list of Northern Ireland's amateur, youth and women's football clubs using a drop down search menu.
IFA Premiership - The club listing of IFA Premiership clubs including team info, squad details, results and fixtures.
Irish Football Association - Club guide of the leading clubs in Northern Ireland.
Foot.dk: Fodboldstatistik - Northern Irish club database for clubs that have participated in the top tier.
Les-Sports.info - Season by season records of Northern Irish football clubs.
Transfermarkt - Overview of Northern Irish club details for the top division.
Weltfussballarchiv - Northern Irish club search.
English Wikipedia - Listing of almost 150 association football clubs in Northern Ireland.