Mostly, also you needed to consider where immigrants could enter, if you came from europe you had to go to ellis island in New York, and if you were from Asia you had to go to angel island in California. If you weren’t processed there you were here illegally and ran the risk of being arrested, so most immigrants wound up staying there since they couldn’t afford to travel..
. the south had two entry points, 1 Texas which you see, since at the time travel to and from Mexico was easy, and Florida which you see reflected in the parts they covered like Tampa bay, which had a massive connection with Cuba.