San Jose, California is 3.1 times larger than Oakland, California.
Area: 150 km2 calculated
Oakland is a major West Coast port city in the U.S. state of California. The Port of Oakland is the busiest port for San Francisco Bay and all of Northern California. Wikipedia
Area: 470 km2 calculated
San Jose is the third-largest city in California, the tenth-largest in the United States, and the county seat of Santa Clara County. San Jose is the largest city within Silicon Valley, which is a major component of the greater Bay Area. It is the largest city in Northern California. Wikipedia