Hillsborough County.
Coos County.
New York's largest county by population is Kings County. At the 2010 Census, the population of Kings County was 2,504,700. The second largest county is Queens County with a population of 2,230,722.
About 1.3 million. About 1,325,000 in 2010.
New Castle County.
1750, 27,505 people
queens
New York's largest county by population is Kings County (which is also the New York City borough of Brooklyn). It has a population of close to 2.6 million as of the 2010 census. New York's largest county by area is St. Lawrence County, which has a population of 111,944 (one hundred and eleven thousand, nine hundred and forty-four) as of the 2010 census.
The largest county in New Jersey is Burlington
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What is the largest county in New York?St. Lawrence is the largest county in New York. St. Lawrence County.It has a land area of 2,685.60 sq. miles. (2000 census)idk who do you think i am answers.com
The latest estimate is from 2008. Bernalillo County with a population of 635,139.
New Mexico has 33 counties. The most populated county in New Mexico is Bernalillo County (662,564 - 2010 Census).