United States New York New York City Kings (Brooklyn) County
| For more about Kings County see Brooklyn, New York.|
In 1898 the five boroughs consolidated into New York City. Each borough's border matches its county's border. This Wiki lists the most data about these at the county level except Brooklyn.
1664 Yorkshire became the first large government unit (not actually a county) organized by New York after the English took control from the Netherlands. It was divided into three ridings including West Riding (now Richmond, Kings, and most of Queens). 
1683 November 1 The Province of New York extinguished Yorkshire, creating Kings County from part of it. 
1898 January 21 The five boroughs were consolidated into New York City and her county governments were dissolved. The Borough of Brooklyn became a borough of Greater New York City, with the same borders as Kings County.