San Jose is the cultural, financial, and political center of Silicon Valley, and the largest city in Northern California by both population and area. With an estimated 2019 population of 1,021,795, it is the third-most populous city in California (after Los Angeles and San Diego) and the tenth-most populous in the United States. Located in the center of the Santa Clara Valley, on the southern shore of San Francisco Bay, San Jose covers an area of 179.97 square miles (466.1 km2). San Jose is the county seat of Santa Clara County, the most affluent county in California and one of the most affluent counties in the United States. The flag of San Jose is the official municipal flag of San Jose, California. The current design, a triband of gold on top, white in the middle, and blue on the bottom with the city’s official seal in the center, has been the official flag since 1984. Full HD.