United States New York Kings (Brooklyn) County
1683 November 1 Richmond County was created by the Province of New York from Yorkshire.
1687 Administrative divisions were started which eventually evolved into townships. 
1898 January 21 The five boroughs were consolidated into New York City and her county governments were dissolved. Staten Island joined New York City as the Borough of Richmond. 
1975 The Borough of Richmond was officially renamed the Borough of Staten Island.