There were 4,403 households, of which 1,548 (35.2%) had children under the age of 18 living in them, 2,214 (50.3%) were opposite-sex married couples living together, 599 (13.6%) had a female householder with no husband present, 254 (5.8%) had a male householder with no wife present.
There were 285 (6.5%) unmarried opposite-sex partnerships, and 26 (0.6%) same-sex married couples or partnerships.
There were 4,221 households of which 35.0% had children under the age of 18 living with them, 54.1% were married couples living together, 13.5% had a female householder with no husband present, and 27.7% were non-families.21.7% of all households were made up of individuals and 5.6% had someone living alone who was 65 years of age or older.The population density was 3,438.0 per square mile (1,327.4/km²).The racial makeup of Grand Terrace was 7,912 (65.7%) White (46.4% Non-Hispanic White), 673 (5.6%) African American, 120 (1.0%) Native American, 778 (6.5%) Asian, 32 (0.3%) Pacific Islander, 1,898 (15.8%) from other races, and 627 (5.2%) from two or more races.The population density was 3,352.3 per square mile (1,293.6/km²).
There were 4,458 housing units at an average density of 1,285.4 per square mile (496.0/km²).
With plenty of irrigation water, Grand Terrace rapidly became an agricultural community featuring fine, quality citrus.
However, the severe "freeze" of 1913 destroyed many groves.
Grand Terrace is located between Highgrove and Colton, along the 215 and Aqua Mansa industrial corridors.
The city is situated between two mountain ridges: Blue Mountain to the east and the La Loma Hills to the west.
According to the city's web site, the 2000 census revealed that Grand Terrace has the highest median income in the Inland Empire region at ,068.