San Francisco is in Northern Colorado.
Dropbox is a file hosting service operated by American company Dropbox , Inc. , headquartered in San Francisco , California , that offers cloud storage , file synchronization , personal cloud , and client software . San Francisco . Located at the north end of the San Francisco Peninsula , San Francisco is about 47.9 sqmi in area , making it the smallest county -- and the only consolidated city-county -- within the state of California .