Final answer:
The top two U.S. Metro Markets by the number of properties are the New York City CSA and the Los Angeles CSA, with populations of 23.5 million and 18.35 million respectively.
Step-by-step explanation:
The top two U.S. Metro Markets by the number of properties are the New York City and Los Angeles Combined Statistical Areas (CSA). The New York City CSA is the most populous in the United States, with an approximate population of 23.5 million. This area includes not only New York City but also smaller cities and towns in northern New Jersey, eastern Pennsylvania, and southern Connecticut. On the other hand, the Los Angeles CSA has an estimated population of 18.35 million people, encompassing Ventura, Orange, Los Angeles, San Bernardino, and Riverside Counties. Although real estate markets have fluctuated, with the Western cities experiencing significant impacts during the real estate market collapse of the late 2000s, these two CSAs still represent the largest urban conglomerations in terms of population in the U.S.