Flat-earthers are people who do not believe that the Earth is a sphere and that photographs of the planet taken from space are a hoax.
The founder of the closed Facebook group, John Perri, said: “Over the past several months, flat earth has not only opened my eyes to truth, but has liberated my mind with a new vision.
“It is a journey, a discovery and a revealing of what has been hidden.”
Members of the flat-earth match-making group come from all over the world – including the US, the Philippines, Uganda, Australia, Germany, Canada, Ecuador, Brazil and even the UK.
The members are very active, with 444 posts in the last month, and the numbers are growing every day.
Some members discuss how difficult it is to date as a flat-earther.
One male member said: “First of all she has to know the earth is flat. So 90 percent of all females on Earth are out already.
“When I meet someone, I usually start by checking if they are aware of chemtrails.
“If they are not (most aren’t) then there’s no way I can come up with the shape of the Earth.”
Another member replied: “I had a guy I was talking to for almost a month walk out of my house laughing at me when I told him the Earth is flat.”
However, the dating group has worked for at least one lucky couple – the founder of the group and his flat-earth girlfriend, who is moving state to be nearer her new partner.
She said: “I walked out of my job, packed as much of my stuff as I could in my Mustang and left for Michigan.
“35 years into my life’s story I will begin to live for the first time. New job, new state, new home, amazing flat-earth man.”
But the group is more than just dating, according to Mr Perri, it is also to build a community around a common belief.
You are only allowed to join if you believe the Earth is flat and if you introduce yourself within two days of being added – this is due to spammers and trolls targeting the group.
Mr Perri said: “We are a family and growing community of believers united together under the banner of truth as we are bonded by the same commonality.
“We are a safe and fun zone for the like-minded to potentially meet the love of your life, to grow in knowledge and to establish and strengthen new friendships.”
The community share links and videos to subjects around the flat-earth theory and discuss it between them.
One member posted a picture of the horizon from the top of Kilimanjaro, the caption reading: “Nice straight horizon that one.”
They also discuss other unconventional beliefs, including that Disney, Harry Potter and Transformers are evil, that partaking in Hallowe’en is wrong and even that meat has healing powers.
One flat-earther said: “There is one thing that I can’t compromise.
“I am a meat eater 100 percent and if any woman wishes to get to know me, she must be a carnivore as well.
“I have studied human anatomy and digestion and know that meat heals and it necessary.
“Have a great day on this level plane earth.