San Jose, California Francisco Bay. Santa Clara Valley is the population center of the Bay Area and, like the hub and spokes of a wheel, surrounding communities emanate outwards from the valley. This growth, in part, has shaped the greater Bay Area as it is today in terms of geographic population distribution and the trend of suburbanization away from the valley. There are four distinct valleys in the city of San Jose: Almaden Valley, situated on the southwest fringe of the city; Evergreen Valley to the southeast, which is hilly all throughout its interior; Santa Clara Valley, which includes the flat, main urban
San Gabriel Valley the San Gabriel Valley according to the 2000 Census was 3.28 persons compared with 2.98 persons for Los Angeles County as a whole. Eight cities in the Valley have average household sizes of over 4 persons, while an unincorporated area, the South San Jose Hills, was at a significant 5.07 persons per household. (Most addresses do not use South San Jose Hills as the city but use La Puente, West Covina, or Valinda.) At the other end of this scale is Sierra Madre, at 2.20 persons per household. The age distribution in the San Gabriel Valley was a little unusual