Mobile is the county seat of Mobile County, Alabama. The population within the city limits was 195,111 as of the 2010 United States Census, making it the third most populous city in the U.S. Wikipedia

Virginia Beach is an independent city located in the U.S. state of Virginia. As of the 2010 census, the population was 437,994. In 2013, the population was estimated to be 448,479. It is the most populous city in Virginia as well as the 39th most populous in the United States. Wikipedia