Rialto is a city in San Bernardino CountyCaliforniaUnited States. The population was 99,171 with the 2010 Census.[11]

Rialto is home to four major regional distribution centersStaples Inc., which serves stores across the entire West Coast of the United StatesToys "R" UsUnder Armour and Target in the northern region of the city, in the Las Colinas community. One of the United States' largest fireworks companies, Pyro Spectaculars, is also headquartered in Rialto.