San Francisquito Creek (Little San Francisco according to one source). It is the dividing line between San Mateo County (left side of picture) and Santa Clara County (right side). The City of East Palo Alto is part of San Mateo County on the left and the City of Palo Alto on the right is part of Santa Clara County and the Silicon Valley. These two jurisdictions are divided by more than a creek. East Palo Alto has a median household income of $50,137 (Census data) while Palo Alto (think Stanford University) has a median household income of $122,532. Yup… households on right side of creek have 2.4 times more income than households on the left. It still pays to go to college.