Half of these users returned to the website on a daily basis, Facebook regional chief Jonathan Labin told a news conference in Dubai, noting a significant increase in the number of people connecting from mobile devices.
"Every month, 56 million people are active on Facebook across the MENA region, with 50 per cent of those returning on a daily basis," Facebook said in a statement.
In total, "33 million people in MENA use a phone or tablet to access the service every month, while the number of daily active users on mobile has reached 15 million.
According to Labin, this increase in Facebook users offers great opportunities for advertisers.
More From This Section
"We are seeing an increase in the number of advertisers who are turning to Facebook to get their message to the people who matter most," he said.
Facebook's mobile advertising revenues have leaped from zero per cent in the first half of 2012 to 41 per cent of total advertising revenues in the second quarter of 2013.
Activists in several Arab world countries have used Facebook and other Internet social networking sites as a speedy, anonymous and efficient engine to organise protests and campaigns that swept the region since 2011.