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<br /> <br />30% <br /> <br />25% <br /> <br />20% <br /> <br />15% <br /> <br />10% <br /> <br />5% <br /> <br />0% <br />1970 - 1980 1980 - 1990 1990 - 2000 2000 - 2010 2010 - 2020 <br />2021 Multijurisdictional Local Hazard Mitigation Plan <br /> <br />Historical Growth Rate <br />Population changes are useful socio-economic indicators. A growing population generally indicates a growing <br />economy, while a decreasing population signifies economic decline. Figure 4-5 shows the percentage population <br />growth rate per decade from 1970 through 2020 for San Mateo County and for the state. The planning area’s <br />population growth of about 5.4 percent through the 1970s increased to 10.6 percent in the 1980s. Population <br />growth slowed slightly in the 1990s and dropped sharply to 1.6 percent between 2000 and 2010. The period from <br />2010 through 2020 saw an increase in population of about 7.3 percent for San Mateo County while the State of <br />California experienced 6.9 percent growth. <br /> <br />Source: California Department of Finance, 2021 <br /> <br /> <br /> California <br />San Mateo County <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> Figure 4-5. State of California and San Mateo County Population Growth per Decade <br /> <br /> <br />Daily Commuting Population <br />County data indicates that San Mateo County has had a greater percentage of people working outside of their <br />place of residence (79.2 percent) than the Bay Area (61.9 percent), California (60 percent), and the United States <br />(43.7 percent). This has remained consistent from 2005 through 2019. <br /> <br />According to the Census Bureau’s American Community Survey for 2019, about 56.8 percent of San Mateo <br />County’s employed population worked in San Mateo County and 42.8 percent worked outside of the county. San <br />Francisco City and County receives the highest number of commuting workers in the nation, and the highest <br />number of commuters to San Francisco are from San Mateo County, followed by Alameda County. <br /> <br />The majority of commuters to San Mateo County came from San Francisco, followed by Santa Clara County, and <br />Alameda County. Some commuters travel to San Mateo County from as far as Sacramento and Tuolumne <br />Counties. About 150,000 out-of-county commuters work in San Mateo County, and more than 100,000 <br />commuters pass through the county as part of their daily commute to San Francisco, the North Bay Area, <br />Alameda County, or the South Bay Area. <br /> <br />This large commuter contingent has impacts on planning for the County’s infrastructure and service needs, as well <br />as on planning for hazard mitigation and emergency management. Commuters may be familiar with the area <br /> <br /> <br /> <br />4-14 % 10-Year Change in Population