Grand Terrace is a city in San Bernardino County, California, United States. The population was 12,040 at the 2010 census, up from 11,626 at the 2000 census. Grand Terrace is located between Highgrove and Colton, along the I-215 and Agua Mansa industrial corridors. The city is situated between two mountain ridges: Blue Mountain to the east and the La Loma Hills to the west.
Grand Terrace's roots go back to Mexican land grants dating from the period between 1830 and 1840. Mormon settlers came shortly after, arriving in the San Bernardino Valley, during the 1850s. According to the Riverside Press, in 1876, there were nine buildings in the Terrace-Colton area. Originally, the area was simply referred to as "the Terrace", but the word "Grand" was added around 1898 due to the beautiful views which surround the city. In 1905, Seventh-day Adventists, whose medical university is now located in nearby Loma Linda, settled in the area. Grand Terrace, at the time known as "South Colton", experienced continued growth and development during the Southern California suburbia and sunbelt periods in the late half of the 20th century.