Real IRS tax-return address changes, not a Census population estimate -- people who
actually filed from a different county the following year. Positive means more people
left than arrived; negative means the reverse. See the
reporting-vs-reality read of this same data
for how this compares against the Census's own population-change numbers.
2019→2020: 47,964 out, 32,841 in, net +15,123
2020→2021: 50,212 out, 30,606 in, net +19,606
2021→2022: 41,030 out, 30,368 in, net +10,662
2022→2023: 34,007 out, 28,591 in, net +5,416
Where San Mateo County, CA's Leavers Went, 2022→2023
Each number below is people who moved specifically from San Mateo County, CA to that one
county, in this one year -- not that county's own total gain from every source. Select it
in the picker above to see its own totals.
Santa Clara County (CA)5,963
San Francisco County (CA)5,242
Alameda County (CA)4,032
Contra Costa County (CA)2,428
Los Angeles County (CA)1,260
Sacramento County (CA)1,104
San Diego County (CA)936
San Joaquin County (CA)852
Solano County (CA)717
Placer County (CA)612
Where San Mateo County, CA's Arrivals Came From, 2022→2023
Each number below is people who moved specifically from that one county to San Mateo County, CA,
in this one year -- not that county's own total loss to everywhere else.
Oluwadi