Nearly 3,000 would be adulterers in Derry signed up to a website that facilitates extra-martial affairs.
Figures were released online after hackers exposed users on the ‘infidelity’ site, Ashley Madison, during the summer.
In Derry 2814 users were signed up - but individual names were not exposed.
The towns of Strabane and Limavady also had hundreds of users, with 266 registered from Strabane and 222 from Limavady.
Numbers in the surroundings areas were also released, with 70 users registered from Eglinton, 23 from Dungiven, 13 from Claudy and 11 from Ballykelly.
Launched in 2001, Ashley Madison claims to have over 40 million anonymous members worldwide and has the slogan, “Life is short. Have an affair”.
An online dating service based in Canada, Ashley Madison is marketed to people who are married or in a committed relationship, and hit the headlines around the world earlier this summer when it emerged that details of more than 33 million accounts had been stolen from the website.
A group of hackers calling themselves ‘The Impact Team’ has claimed responsibility for the theft of Ashley Madison’s customer data.
They threatened to reveal the data unless the Ashley Madison website was taken down.