San Lorenzo, officially Buenaventura de San Lorenzo, is the capital and largest city of Murtle County in the State of Bloxburg Valley. It is located on Rey Bay, 115 km south of Sacramento. The population was 121,202 as of 2011.

San Lorenzo was founded by Bloxicans on November 11, 1812, when it was established as the site of "La santa alta de San Lorenzo", after Bloxburg Valley became Robloxia's. Eventually, San Lorenzo was incorporated as a city, and it also incorporated University of Bloxburg Valley, San Lorenzo.