The number of association conferences held in the country jumped from 38 to 74 between 2013 and 2014, an increase of nearly 100%.
The nation's capital, Tallinn, also scored big in the city rankings, moving from 90th place to 46th. The city hosted 54 ICCA conferences last year compared to 27 in 2013.
In the European rankings, Tallinn holds 25th place. Meanwhile, Estonia's university town of Tartu, which held 14 international association conferences last year, comes in 92nd place, putting in the same league as university towns such as Turku, Leipzig and Leuven.
According to the ECB, the improvements can be attributed to destination marketing within the Conference Ambassador Programme and close communication with ECB members when collecting data.
The Estonian Convention Bureau is a non-profit organisation established jointly by public and private sector bodies. It was founded in March 2008 in order to attract international conventions to Estonia. The bureau's 29 members include the cities of Tallinn and Tartu, the national carrier Estonian Air, and a number of DMCs, PCOs and hotels. It is co-financed by the Estonian Tourist Board, Enterprise Estonia.