Demographic history of New York City – Wikipedia

Overview. The population of New York City was over 90% Non-Hispanic White until the post-World War II era. Large numbers of non-whites only began settling in Manhattan in the 1920s and in the rest of NYC after World War II. The slowest area in the city to change its racial makeup was Staten Island, which was the only borough of New York City to retain a Non-Hispanic White majority after the 1980s.

https://en.wikipedia.org/wiki/Demographic_history_of_New_York_City