About this dataset

Context

The dataset tabulates the data for the San Mateo, CA population pyramid, which represents the San Mateo population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates. It lists the male and female population for each age group, along with the total population for those age groups. Higher numbers at the bottom of the table suggest population growth, whereas higher numbers at the top indicate declining birth rates. Furthermore, the dataset can be utilized to understand the youth dependency ratio, old-age dependency ratio, total dependency ratio, and potential support ratio.

Key observations

• Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for San Mateo, CA, is 24.8.
• Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for San Mateo, CA, is 24.4.
• Total dependency ratio for San Mateo, CA is 49.2.
• Potential support ratio, which is the number of youth (working age population) per elderly, for San Mateo, CA is 4.1.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.

Age groups:

• Under 5 years
• 5 to 9 years
• 10 to 14 years
• 15 to 19 years
• 20 to 24 years
• 25 to 29 years
• 30 to 34 years
• 35 to 39 years
• 40 to 44 years
• 45 to 49 years
• 50 to 54 years
• 55 to 59 years
• 60 to 64 years
• 65 to 69 years
• 70 to 74 years
• 75 to 79 years
• 80 to 84 years
• 85 years and over

Variables / Data Columns

• Age Group: This column displays the age group for the San Mateo population analysis. Total expected values are 18 and are define above in the age groups section.
• Population (Male): The male population in the San Mateo for the selected age group is shown in the following column.
• Population (Female): The female population in the San Mateo for the selected age group is shown in the following column.
• Total Population: The total population of the San Mateo for the selected age group is shown in the following column.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for San Mateo Population by Age. You can refer the same here

Comprehensive demographic dataset for San Mateo, CA, US including population statistics, household income, housing units, education levels, employment data, and transportation with year-over-year changes.

About this dataset

Context

The dataset tabulates the San Mateo County population over the last 20 plus years. It lists the population for each year, along with the year on year change in population, as well as the change in percentage terms for each year. The dataset can be utilized to understand the population change of San Mateo County across the last two decades. For example, using this dataset, we can identify if the population is declining or increasing. If there is a change, when the population peaked, or if it is still growing and has not reached its peak. We can also compare the trend with the overall trend of United States population over the same period of time.

Key observations

In 2023, the population of San Mateo County was 726,353, a 0.35% decrease year-by-year from 2022. Previously, in 2022, San Mateo County population was 728,929, a decline of 1.38% compared to a population of 739,149 in 2021. Over the last 20 plus years, between 2000 and 2023, population of San Mateo County increased by 18,189. In this period, the peak population was 768,658 in the year 2017. The numbers suggest that the population has already reached its peak and is showing a trend of decline. Source: U.S. Census Bureau Population Estimates Program (PEP).

Content

When available, the data consists of estimates from the U.S. Census Bureau Population Estimates Program (PEP).

Data Coverage:

• From 2000 to 2023

Variables / Data Columns

• Year: This column displays the data year (Measured annually and for years 2000 to 2023)
• Population: The population for the specific year for the San Mateo County is shown in this column.
• Year on Year Change: This column displays the change in San Mateo County population for each year compared to the previous year.
• Change in Percent: This column displays the year on year change as a percentage. Please note that the sum of all percentages may not equal one due to rounding of values.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for San Mateo County Population by Year. You can refer the same here

Graph and download economic data for Resident Population in San Mateo County, CA (CASANM0POP) from 1970 to 2024 about San Mateo County, CA; San Francisco; residents; CA; population; and USA.

Comprehensive demographic dataset for Shoreview, San Mateo, CA, US including population statistics, household income, housing units, education levels, employment data, and transportation with year-over-year changes.

About this dataset

Context

The dataset tabulates the population of San Mateo by race. It includes the population of San Mateo across racial categories (excluding ethnicity) as identified by the Census Bureau. The dataset can be utilized to understand the population distribution of San Mateo across relevant racial categories.

Key observations

The percent distribution of San Mateo population by race (across all racial categories recognized by the U.S. Census Bureau): 41.24% are white, 1.49% are Black or African American, 1.34% are American Indian and Alaska Native, 27.06% are Asian, 1.64% are Native Hawaiian and other Pacific Islander, 13.90% are some other race and 13.33% are multiracial.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.

Racial categories include:

• White
• Black or African American
• American Indian and Alaska Native
• Asian
• Native Hawaiian and Other Pacific Islander
• Some other race
• Two or more races (multiracial)

Variables / Data Columns

• Race: This column displays the racial categories (excluding ethnicity) for the San Mateo
• Population: The population of the racial category (excluding ethnicity) in the San Mateo is shown in this column.
• % of Total Population: This column displays the percentage distribution of each race as a proportion of San Mateo total population. Please note that the sum of all percentages may not equal one due to rounding of values.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for San Mateo Population by Race & Ethnicity. You can refer the same here

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Resident Population in San Mateo County, CA was 742.89300 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in San Mateo County, CA reached a record high of 768.65800 in January of 2017 and a record low of 556.30000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in San Mateo County, CA - last updated from the United States Federal Reserve on October of 2025.