The Land of Smiles saw its status on the world's international tourist arrival chart slip to 14th last year from 10th in 2013.
The 2014 tourism earnings chart also saw Thailand drop to ninth from seventh a year ago, according to new figures from the UN World Tourism Organization (UNWTO).
Thailand's 2014 international arrivals fell 6.7 per cent from 2013 to 24.8 million.
Its 2014 tourism receipts contracted 8.1pc to US$38.4 billion from $41.8 billion in 2013.
The 10th position in arrivals was taken over by Mexico last year with a record 29.1 million people.
In terms of international receipts, Thailand's 2013 ranking of seventh was assumed by Britain in 2014 with $45.3 billion.
The Tourism Authority of Thailand said the political stand-off in the early part of last year coupled with the May 22 coup and the sluggish economies of Thailand's main tourism markets such as Russia, Japan and Europe caused tourists to delay their trips here.
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