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.

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

About this dataset

Context

The dataset tabulates the data for the San Mateo County, CA population pyramid, which represents the San Mateo County 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 County, CA, is 24.6.
• Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for San Mateo County, CA, is 26.1.
• Total dependency ratio for San Mateo County, CA is 50.7.
• Potential support ratio, which is the number of youth (working age population) per elderly, for San Mateo County, CA is 3.8.

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 County 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 County for the selected age group is shown in the following column.
• Population (Female): The female population in the San Mateo County for the selected age group is shown in the following column.
• Total Population: The total population of the San Mateo County 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 County Population by Age. You can refer the same here

Graph and download economic data for Population Estimate, Total, Not Hispanic or Latino, American Indian and Alaska Native Alone (5-year estimate) in San Mateo County, CA (B03002005E006081) from 2009 to 2023 about San Mateo County, CA; Native Alaskan; American Indian; San Francisco; non-hispanic; estimate; persons; 5-year; CA; population; and USA.

Graph and download economic data for Estimate of Median Household Income for San Mateo County, CA (MHICA06081A052NCEN) from 1989 to 2023 about San Mateo County, CA; San Francisco; CA; households; median; income; and USA.

Graph and download economic data for Percent of Population Below the Poverty Level (5-year estimate) in San Mateo County, CA (S1701ACS006081) from 2012 to 2023 about San Mateo County, CA; San Francisco; poverty; percent; 5-year; CA; population; and USA.

About this dataset

Context

The dataset tabulates the San Mateo County population distribution across 18 age groups. It lists the population in each age group along with the percentage population relative of the total population for San Mateo County. The dataset can be utilized to understand the population distribution of San Mateo County by age. For example, using this dataset, we can identify the largest age group in San Mateo County.

Key observations

The largest age group in San Mateo County, CA was for the group of age 30 to 34 years years with a population of 57,520 (7.72%), according to the ACS 2019-2023 5-Year Estimates. At the same time, the smallest age group in San Mateo County, CA was the 80 to 84 years years with a population of 15,614 (2.10%). Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates

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 in consideration
• Population: The population for the specific age group in the San Mateo County is shown in this column.
• % of Total Population: This column displays the population of each age group as a proportion of San Mateo County 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 County Population by Age. You can refer the same here

Demographics, including median income, total population, race, ethnicity, and age for unincorporated areas in San Mateo County. This data comes from the 2012 American Community Survey 5 year estimates DP03 and DP05 files. They Sky Londa area is located within two Census Tracts. The data for Sky Londa is the sum of both of those Census Tracts. Users of this data should take this into account when using data for Sky Londa.

Graph and download economic data for Population Estimate, Total, Not Hispanic or Latino, Some Other Race Alone (5-year estimate) in San Mateo County, CA (B03002008E006081) from 2009 to 2023 about San Mateo County, CA; San Francisco; non-hispanic; estimate; persons; 5-year; CA; population; and USA.

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 August of 2025.

U.S. Census Bureau QuickFacts statistics for San Mateo County, California. QuickFacts data are derived from: Population Estimates, American Community Survey, Census of Population and Housing, Current Population Survey, Small Area Health Insurance Estimates, Small Area Income and Poverty Estimates, State and County Housing Unit Estimates, County Business Patterns, Nonemployer Statistics, Economic Census, Survey of Business Owners, Building Permits.

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Face refers to the areal (polygon) topological primitives that make up MTDB. A face is bounded by one or more edges; its boundary includes only the edges that separate it from other faces, not any interior edges contained within the area of the face. The Topological Faces Shapefile contains the attributes of each topological primitive face. Each face has a unique topological face identifier (TFID) value. Each face in the shapefile includes the key geographic area codes for all geographic areas for which the Census Bureau tabulates data for both the 2020 Census and the annual estimates and surveys. The geometries of each of these geographic areas can then be built by dissolving the face geometries on the appropriate key geographic area codes in the Topological Faces Shapefile.

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The All Roads Shapefile includes all features within the MTDB Super Class "Road/Path Features" distinguished where the MAF/TIGER Feature Classification Code (MTFCC) for the feature in MTDB that begins with "S". This includes all primary, secondary, local neighborhood, and rural roads, city streets, vehicular trails (4wd), ramps, service drives, alleys, parking lot roads, private roads for service vehicles (logging, oil fields, ranches, etc.), bike paths or trails, bridle/horse paths, walkways/pedestrian trails, and stairways.

Boundaries of 2014 Census Designated Places in San Mateo County. This data includes boundaries for: Atherton, Belmont, Brisbane, Broadmoor, Burlingame, Colma, Daly City, East Palo Alto, El Granada, Emerald Lake Hills, Foster City, Half Moon Bay, Highlands-Baywood Park, Hillsborough, Ladera, La Honda, Loma Mar, Menlo Park, Millbrae, Montara, Moss Beach, North Fair Oaks, Pacifica, Pescadero, Portola Valley, Redwood City, San Bruno, San Carlos, San Mateo, South San Francisco, West Menlo Park, and Woodside.

More information about Census Designated Places can be found on the US Census site: https://www.census.gov/geo/reference/gtc/gtc_place.html

About this dataset

Context

The dataset tabulates the population of San Mateo County by gender across 18 age groups. It lists the male and female population in each age group along with the gender ratio for San Mateo County. The dataset can be utilized to understand the population distribution of San Mateo County by gender and age. For example, using this dataset, we can identify the largest age group for both Men and Women in San Mateo County. Additionally, it can be used to see how the gender ratio changes from birth to senior most age group and male to female ratio across each age group for San Mateo County.

Key observations

Largest age group (population): Male # 30-34 years (30,026) | Female # 35-39 years (27,541). Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.

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

Scope of gender :

Please note that American Community Survey asks a question about the respondents current sex, but not about gender, sexual orientation, or sex at birth. The question is intended to capture data for biological sex, not gender. Respondents are supposed to respond with the answer as either of Male or Female. Our research and this dataset mirrors the data reported as Male and Female for gender distribution analysis.

Variables / Data Columns

• Age Group: This column displays the age group for the San Mateo County 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 County is shown in the following column.
• Population (Female): The female population in the San Mateo County is shown in the following column.
• Gender Ratio: Also known as the sex ratio, this column displays the number of males per 100 females in San Mateo County for each age group.

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 Gender. You can refer the same here

Estimate, Median Age by Sex, Total Population (5-year estimate) in San Mateo County, CA was 40.60000 Years of Age in January of 2023, according to the United States Federal Reserve. Historically, Estimate, Median Age by Sex, Total Population (5-year estimate) in San Mateo County, CA reached a record high of 40.60000 in January of 2023 and a record low of 38.80000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Estimate, Median Age by Sex, Total Population (5-year estimate) in San Mateo County, CA - last updated from the United States Federal Reserve on July of 2025.

Population Estimate, Total, Hispanic or Latino (5-year estimate) in San Mateo County, CA was 185378.00000 Persons in January of 2023, according to the United States Federal Reserve. Historically, Population Estimate, Total, Hispanic or Latino (5-year estimate) in San Mateo County, CA reached a record high of 190045.00000 in January of 2017 and a record low of 161800.00000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Hispanic or Latino (5-year estimate) in San Mateo County, CA - last updated from the United States Federal Reserve on August of 2025.

This polygon shapefile represents population from the 2010 US Census Bureau for San Mateo County, California. The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The purpose of this file is to provide the geography for the 2010 Census Blocks along with their 2010 housing unit count and population. Census Blocks are statistical areas bounded on all sides by visible features, such as streets, roads, streams, and railroad tracks, and/or by nonvisible boundaries such as city, town, township, and county limits, and short line-of-sight extensions of streets and roads. Blocks are the smallest geographic areas for which the Census Bureau publishes data from the decennial census. A block may consist of one or more faces. This layer is part of the San Mateo County Sea Level Rise Vulnerability Assessment Project.

Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in San Mateo County, CA was 15321.00000 Persons in January of 2023, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in San Mateo County, CA reached a record high of 21434.00000 in January of 2009 and a record low of 15321.00000 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in San Mateo County, CA - last updated from the United States Federal Reserve on August of 2025.

Census data for cities and Census Designated Places in San Mateo County. Includes population, race, Hispanic ethnicity, gender, age groups, household, family, and housing information. This data is from the 2010 United States Census Summary File 1 (SF1).