An official 2008 population estimate for California's San Fernando Valley is not publicly published by the U.S. Census Bureau. The most reliable baseline comes from the 2010 Census, which recorded a total population of 1,762,590 for the Valley. Demographers often interpolate between the 2000 Census (approx. 1.69 million) and the 2010 figure to estimate the 2008 population at roughly 1.73–1.75 million, but this remains an approximation.
For planning or research purposes, the 2010 Census data is the standard reference. The Valley’s population has likely grown since then, with recent American Community Survey (ACS) estimates suggesting continued increase driven by housing development and immigration. Always check the latest ACS 5-year estimates for the most current figures.