Take a good look, Dio. The Ellis Island Records only go until 1924 and the vast majority of people came through there much earlier.
In 1924, Yugoslavia was only a few years old. Previous to 1918, virtually immigrants who came from today's Croatia, Bosnia and even the Bay of Kotor, were listed as having come from "Austria", "Hungary" or anything that the US official could make out of what the immigrant (who didn't speak English) was saying, because they were all citizens of the Austro-Hungarian Empire back then.
If you actually "did a quick search" as you suggested, you'd know that you can't just search by country, you have to search by an individual name.
And yes, my Croat cousin who grew up in Zadar, told me that most Dalmatians, even those over there, didn't solidify their identities as "Croatians" until the bombing of Dubrovnik in the 1990's -- then they all became "Croats" all the way.
But, we really need to post more things about Croatia, so that the discussion will be topical to the post. Instead, we have a post about Serbia and Kosovo, and here you off on the Croatian history tangent again.
Funnnily enough, the numbers for those declaring themselves "Dalmatians" is less than 0.5%.
If you actually "did a quick search" as you suggested, you'd know that you can't just search by country, you have to search by an individual name.
Exactly, and it shows them to list themselves as Croatian, unless they were listed as Austrian.