Certain prepositions (after, as, before, since, until) serve as subordinating conjunctions when they're followed by a clause: 1  You better get out of town before sundown. (Before is used as a preposition.) 2  Many people run out of ideas long before they run out of words. (Before is used as a conjunction.)
Sponsored Topics. Foster City is an affluent planned city located in San Mateo County, California, 94404. As of the 2010 census, the city had a total population of 30,567. Forbes ranked Foster City #10 on their 2009 list of America's Top 25 Towns to Live Well.
Foster City Population by Gender. Foster City, CA population data, segmented by gender, is displayed in the table below. 48.3% of the residents are men. The population is 51.7% females.