ANSWER: Population

Los Angeles County

Los Angeles County (incorporated as the County of Los Angeles) is a county in California and is the most populous county in the United States. Figures from the U.S. Census Bureau give an estimated 2009 population of 9,848,011 residents, while the California Department of Finance lists a July 1, 2010, estimate of 10,473,535. The county seat is the city of Los Angeles, the largest city in California and the second-largest city in the United States (after New York City).

Matt: CORRECT
Record: 329-288