I am answering this question with a question that is not sarcastic at all but actually an interesting concept. The answer is probably--Vatican City!
Vatican City is recognized as an independent city-state, yet because of it's size and population, likely has the fewest number of Roman Catholics. Talk about irony!
In terms of per capita, I would have to go with the People's Republic of China, simply based on a population of 1.3 billion and the small number of Catholics.
Roman Catholic AnswerUkranian Catholics ARE Roman Catholics, so NO, they Mass if not like Roman Catholics it is Roman Catholic.
There are Catholics in Sweden but the country is primarily Protestant.
Brazil has the most Catholics of all the countries in the world.
The link below lists the number of Catholics in each country.
the US has about 24% of its population as Roman Catholic. Meaning that about 75,000,000 Americans are Roman Catholic. The largest of any other country.
Roman Catholic AnswerThe link below gives the total number of Catholics by country in an article in Wikipedia.
You would need to specify a country, or at least a region, and perhaps a century to try and narrow your question down so that perhaps it can be answered.
Roman Catholics normally refer to themselves are Catholics or Roman Catholics. Sometimes they use a name associated with a religious if more clarity is desired.
Catholics are found in every country in the world. However, there are some countries (eg: Saudi Arabia) where Catholics are forbidden to worship.
The State of Vatican City, a small country inside Rome Italy.
None. Roman Catholics are Christian.
Most are Roman-Catholics Most are Roman-Catholics