More than 2,000 local people are registered members of the Ashley Madison adultery website.
The controversial site encourages people to meet up and have an affair and has caused huge controversy after it was hacked earlier this year with information on its members posted online.
More than 37 million people have had their details published, including 110,000 in Ireland.
Of that figure it has emerged that 994 members are registered in Dundalk, with all bar 8.5% of them male, while just over 1,000 are signed up in Drogheda.
A further 154 people are registered in Louth Village, with 10% of them female and 58 are in Ardee, with 93% of them female.
Many names used by account holders are pseudonyms but it is also worth noting that Ashley Madison does not verify email addresses on the site so it is possible to sign up using someone else’s email.
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