After 1893 Long Island State Hospital (Flatbush) served the counties of Kings, Queens, Nassau, and Suffolk.
I’m still trying to figure out all the different “lunatic asylums” of New York City. From the beginning, New York and Kings Counties were exempted from The Willard Act. In 1893, the State of New York purchased these properties and brought them into the State Care System, the State Care Act being passed in 1890, and under the control of The State Commission in Lunacy. On July 1, 1895, the Kings County Lunatic Asylum at Flatbush AND Kings Park (re-named in 1891, formerly St. Johnland) became the Long Island State Hospital. From everything that I have read, the New York City area asylums and poor houses of the 1800s were the worst in the state, mainly because they were so over crowded.
NEW YORK CITY:
New York City is composed of five boroughs: Manhattan (New York County), The Bronx (Bronx County), Brooklyn (Kings County), Queens (Queens County), Staten Island (Richmond County). LONG ISLAND contains four counties: Kings, Queens, Nassau, and Suffolk. Apparently in today’s vernacular, “Long Island” refers to the suburban counties of Nassau and Suffolk only, in order to differentiate them from New York City even though all four counties are located on Long Island. MANHATTAN is a separate island.
Brooklyn was an independent city until January 1, 1898, when, according to the Charter of Greater New York, Brooklyn was consolidated with the other boroughs to form the modern City of New York. Brooklyn has had the same boundaries as Kings County since 1896.