population density san marcos ca
Population of San Marcos, CA. Last official estimated population of San Marcos city (San Diego County**, California state) was 92,929 (year 2014)[1]. This was 0.029% of total US population and 0.24% of total California state population. Area of San Marcos city is 24.4 miÂ² (=63.2 kmÂ²)[6], in this year population density was 3,810.91 p/miÂ².