The Lucan twins, who shot to fame on X Factor three years ago, have made almost €6m since 2009.
The pair were listed at number 24 on the list of the 50 richest reality TV stars in the UK.
The 21-year-old Grimes brothers have earned an estimated €5.8m, while fellow Irish music stars Niall Horan and Nadine Coyle came in the top 20 on the list.
John and Edward have made their millions from touring, albums, TV shows, advertisements, and endorsements for firms such as Nintendo and Moneymarket.com.
The larger-than-life twins are currently stateside after flying over to visit their Celebrity Big Brother pal Tara Reid.
The trio were spotted having lunch together in Beverly Hills yesterday and the 37-year-old American Pie actress told her followers on Twitter how the duo had flown out to see her.
She wrote: "My favourite twins are in town visiting me I am so happy aka jedward!"
And it seems the twins were enjoying their US adventure, telling their 742,965 followers on Twitter they were: "Driving Around LA".
While Jedward achieved an honourable place on the list, the biggest Irish star by far proved to be One Direction's Niall Horan.
At the age of just 19, the Mullingar native his One Direction bandmates were third on the list -- with a cool €23.5m each.
Girls Aloud's Irish singing sensation Nadine Coyle (27) is ranked at number 18 in the rich list with €7m in earnings.
X Factor boss Simon Cowell topped the list with an estimated fortune of €263m.
finished just ahead of his protege, Britain's Got Talent finalist Susan Boyle, who came second with €27.5m.
Cowell (53) has proved to be the biggest success story of the British reality TV juggernaut after paying himself €54m for judging series one of the US X Factor.
The music mogul bagged €35m per series on American Idol, and signed a €7.6m deal with ITV.
Girls Aloud singer Nadine Coyle was the second top earner among Irish stars, but she earned the least of the Girls Aloud stars and was placed in 18th position.
Cheryl Cole earned the most with €17.5m, placing her in fifth. Her bandmate Kimberley Walsh came 11th, Nicola Roberts came 13th and Sarah Harding finished 15th.
Half of the top 50 stars on the rich list have featured on singing shows.
Britain's Got Talent, accounts for five spots on the list, as does Big Brother, while only two have featured on The Apprentice. One became rich via Dragon's Den.
The list also predicts that X Factor's Rylan Clark is on course to be a millionaire by the end of 2013.