Tourism Research Australia's International Visitor Survey showed a 12 per cent growth in US visits to the state, ahead of the Hong Kong visitor intake that sat at 7 per cent growth.

Meanwhile, its National Visitor Survey data revealed a 13 per cent growth in overnight stays in Tasmania, 10 per cent growth of visitor nights, and a 21 per cent increase in spending, with Australians aged 30 to 54 spending an average $809 per trip.

A total spend of $2.8 billion by visitors to Tasmania was recorded across the year.

These results are mirrored across the country, with a record number of international visitors to Australia in the year to June 2019.

The data, while showing an increase at face value, ultimately represents an overall slowing down of tourism growth in the state when compared to previous data.

Tourism Industry Council Tasmania chief executive Luke Martin said this was not cause for alarm and should instead allow government and industry to plan for the future.

He added that the declining Chinese market reflected a travel slump out of that country, which was being felt across Australia.

"The growth is slowing but the positive message is that we as an industry need to diversify the international markets and not throw our eggs all into one basket," Mr Martin said.

"After years of extraordinary growth for domestic and international tourism, the trend for the last six to 12 months is that growth is slowing...the brakes are on but we need to look at the reasons why and accept that the growth cannot be taken for granted."

Mr Martin flagged accommodation and flight availability as issues for growth but said talk of restoring international direct flights could have a positive impact.