According to the
link, the portion of Ventura County that's not part of the Greater LA federation has an estimated 15,000 Jews, but that's from 1997-2001 and has not been updated since.
So for Greater LA, the most recent figures are:
Greater LA: 564,700 (community study)
Long Beach + West OC: 28,300 (community study)
Oxnard, Ventura, Ojai Valley, Santa Clara River Valley: 15,000 (1997-2001 estimate)
IE: 50,500 (AJPP 2020 estimate)
Long Beach city has about 18,100, according to the most recent community study. Round that up to 20,000 (I'm sure there are 1,900 extra Jews in Lakewood, Signal Hill, Cerritos, Whittier, La Mirada, La Habra Heights, etc.) to include the rest of the LA County portion area and exclude OC.
OC: 87,000 (AJPP 2020 estimate)
All that's remaining is the SGV of LA County. The SGV estimate of 30,000 includes Upland, Rancho Cucamonga, Fontana, San Bernardino, Ontario, Chino, etc. I think anywhere in the neighborhood of 10-20,000 sounds reasonable. Let's just split it right down the middle and say 15,000.
So...
564,700 (Greater LA)
15,000* (Oxnard/Ventura)
20,000 (Long Beach + Gateway Cities)
87,000* (OC)
15,000* (SGV)
50,500* (IE)
Total: 752,200
AJPP estimated about 709,000 for the five-county Greater LA region.
* No recent local community study has been done or is in the pipeline.