So we have a country for almost each region: north america, asia and australia. Did any of the countries in the list surprise you? Is there a particular country you want to visit purposefully just to gamble? Whole list can be seen
here.
I saw this data also 
Most of the statistics that were used for the survey we find online regards to the subject matter is from gambling losses, at least that was what I read up and US is actually topping those list followed by China. But why China? When they declare gambling as illegal yet they find a way to gamble. Or I think their population also contribute to how much total loses they have compared to the numbers from other countries.
However, I was surprised Nigeria was not in the list of top 10 gambling countries. I use to think Nigeria will be in that grade because of the numbers of increasing gambling houses and online gambling apps in the country. Or perhaps Nigerians focus more on football gambling and not basically series of casino games which contribute a whole lot to gambling games than football even though football is popular.
Which country is most attracted to gambling or which country's gambling platform generates the most revenue, the answer to these two questions will be the same, with the United States leading the way. If you search online platforms, the United States is far ahead in gambling. There is a good reason for the position of China. China is a populous country, despite various government restrictions, but people are quite active on online gambling platforms. Since the population is large, it is natural that their average ratio will be higher. If we consider the betting in terms of money in comparison, I think Nigeria could also be one of the top countries. The country has a large number of gamblers who are very attracted to sports betting. It doesn't included in the list now, the country will definitely make it to the top list in the next few years.