Maternal Characteristics

Santa Clara & San Mateo Counties | 2019

Average Age at Time of First BirthAverage Number of Children per Woman
Black or African American31.651.89
Native Hawaiian or Pacific Islander29.781.89
Hispanic or Latino29.412.16
Less Than a Bachelor’s Degree29.52.12
Bachelor’s Degree or Higher33.51.61
Native Born31.41.84
All Women32.01.82

Data Source:

U.S. Department of Health and Human Services, Centers of Disease Control and Prevention (CDC)


Silicon Valley Institute for Regional Studies

Data is from the United States Department of Health and Human Services (US DHHS), Centers for Disease Control and Prevention (CDC), National Center for Health Statistics (NCHS), Division of Vital Statistics, Natality public-use data. Silicon Valley includes Santa Clara & San Mateo Counties. Average Age of Mother At Time of First Birth is calculated as the average age of women who gave birth to their first child that year. Women with a bachelor’s degree or higher includes Bachelor’s degree (BA, AB, BS), Master’s degree (MA, MS), Doctorate (PHD, EdD) or Professional Degree (MD, DDS, DVM, LLB, JD). Women with less than a bachelor’s degree includes 8th grade or less, 9th through 12th grade with no diploma, High school graduate or GED completed, Some college credit but not a degree, and Associate degree (AA, AS). The average number of children per woman is calculated only for those women who gave birth that year. For 2008 data, those giving birth to their “6th child and over” were counted as having their 6th child for the purposes of creating an average; for 2018 data, those who had given birth to “8 or more” children were counted as having their 8th child for the purposes of creating an average. It includes live births only, and is a snapshot in time; it is not a replacement for a true population-level fertility rate. Data by educational attainment level does not include women whose education attainment level was unknown or excluded. Foreign-born women include those born outside of the U.S. (including possessions); native-born women include those born within the 50 U.S. states.

Only includes women who gave birth in 2019.

Resources for Relevant Data and Reports (show)

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