Complex sentence: As of the 2010 U.S. Census, the county has a population of 9,818,605, making it by far the most populous county in the United States; the county alone has more people than 43 individual U.S. states.
Split into simpler sentences: As of the 2010 U.S. Census, the county has a population of 9,818,605, making it by far the most populous county in the United States. The county alone has more people than 43 individual U.S. states.