Grand Terrace, city (1990 pop. 10,946), San Bernardino co., S Calif., residential suburb 55 mi/89 km E of downtown Los Angles and 6 mi/9.7 km S of San Bernardino; 34°02'N 117°19'W. Citrus-and vegetable-growing area in area of rapid urban growth (1980s and 1990s). Mfg. (pumps).