Bloomington is an unincorporated community and census-designated place in San Bernardino County, California, within the Inland Empire. It lies about fifty miles east of downtown Los Angeles, between the incorporated cities of Fontana to the west and Rialto to the north and east, along the Interstate 10 corridor with the San Gabriel Mountains rising to the north. The area's origins are agricultural. Like much of the Inland Empire, Bloomington grew from farming and ranching land, and the arrival of Interstate 10 in 1947, providing a four-lane route between Ontario and San Bernardino, encouraged settlement and reduced travel times to the region's urban centers. Bloomington High School opened in 1962 as part of the Colton Joint Unified School District, marking the community's growth as a residential suburb. By the 1970s the area had become more urbanized while retaining elements of its agrarian past. Today Bloomington functions as a working community shaped by transportation and logistics. The Union Pacific Railroad's Alhambra Subdivision crosses the community and includes a hump yard, and Interstate 10 carries heavy regional traffic through the area. The Amtrak Sunset Limited uses the same rail corridor, though the nearest station is in neighboring Fontana. These transportation assets tie Bloomington to the Inland Empire's broader distribution and industrial economy. The community's housing is a mix of mid-century single-family homes and newer infill, and its population is diverse, reflecting the Inland Empire's broader demographic patterns. Because Bloomington is unincorporated, it relies on San Bernardino County for police, planning, and other municipal services, which shapes how the community develops and how residents engage with local government. Residents are served by the Colton Joint Unified School District and by San Bernardino County services. Bloomington's location between Fontana and Rialto places shopping, employment, and amenities of both cities within easy reach, and its position on the I-10 corridor keeps the wider region accessible.