| Population Growth in the California-Baja California Region | |||||
|---|---|---|---|---|---|
| Year | San Diego County | Imperial Valley | Tijuana | Mexicali | Total |
| 1930 | 209,659 | 60,903 | 11,000 | 29,985 | 311,547 |
| 1940 | 289,348 | 59,740 | 22,000 | 44,399 | 415,487 |
| 1950 | 556,808 | 62,975 | 65,000 | 124,362 | 809,145 |
| 1960 | 1,033,011 | 72,105 | 166,000 | 281,333 | 1,552,449 |
| 1970 | 1,367,200 | 74,400 | 341,000 | 396,324 | 2,178,924 |
| 1980 | 1,873,300 | 92,500 | 462,000 | 510,664 | 2,938,464 |
| 1990 | 2,520,500 | 110,400 | 747,000 | 601,938 | 3,979,838 |
| 1995 | 2,690,255 | 141,500 | 1,035,415 | 695,805 | 4,562,975 |