The congresses attracted 792,000 visitors, an increase of 18 per cent compared to 2010.
On average 83 congresses were held each month – almost 3 per day – across 200 sites, including congress centres, scientific venues and hotels.
The rise in the average number of participants at Parisian congresses increased from 701 in 2010 to 795 in 2011.
Medical congresses accounted for 48 per cent of congresses held in the region.
Scientific venues hosted more events (302) than venues dedicated specifically to congresses (288).
Some 31 new events chose the French capital for their debut.
Paris was recently ranked 2nd in the ICCA rankings, which measures the number of international association meetings held across the world.
In 2012, Paris has already hosted an international urology congress for the EAU, attracting around 13,000 delegates, and the Euro PCR congress on cardiovascular interventions.
June will see 10,000 descend on the capital for the Euroanaesthesia meeting and 6,000 are expected for the World Federation of Hemophilia (WFH) in July.