San Mateo County Population 2018

San Mateo County's estimated population is 771,410 with a growth rate of 0.24% in the past year according to the most recent United States census data. San Mateo County is the 14th largest county in California.

Year Population Growth Growth Rate
2017771,4101,8490.24%
2016769,5612,7820.36%
2015766,7797,6231.00%
2014759,1568,8111.17%
2013750,3459,7011.31%
2012740,64411,6221.59%
2011729,0229,1231.27%
2010719,89970,27610.82%
1990649,62362,29410.61%
1980587,32931,0955.59%
1970556,234111,84725.17%
1960444,387208,72888.57%
1950235,659123,877110.82%
1940111,78234,37744.41%
193077,40540,624110.45%
192036,78110,19638.35%
191026,58514,491119.82%
190012,0942,00719.90%
189010,0871,41816.36%
18808,6692,03430.66%
18706,6353,421106.44%
18603,2140.00%

San Mateo County Population Growth

Population Data via

San Mateo County Race Data

Race Population Percentage
White473,35561.36%
Asian214,93427.86%
Two or More Races34,7814.51%
Black or African American21,7432.82%
Native Hawaiian and Other Pacific Islander12,0411.56%
American Indian and Alaska Native6,3370.82%

San Mateo County Population Pyramid

0k5k10k15k20k25k30k Male Population0k5k10k15k20k25k30k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990