 The most recent county formation in New York was in 1914, when Bronx County was created from the portions of New York City that had been annexed from Westchester County in the late 19th century and added to New York County.New York's counties are named for a variety of Native American words; British provinces, counties, cities, and royalty; early American statesmen and military personnel; and New York State politicians.The FIPS county code is the five-digit Federal Information Processing Standard (FIPS) code which uniquely identifies counties and county equivalents in the United States.