County
San Mateo County, CA
In the IRS's 2022–2023 Statistics of Income migration data, San Mateo County, CA recorded 19,373 households (28,997 people) moving in and 21,581 households (34,007 people) moving out — a net lost of 2,208 households and $681.64M in reported adjusted gross income.
The single largest recorded source of newcomers was Santa Clara County, CA: 3,879 households (5,845 people) moved from there, representing $975.65M in reported income.
At the state level, no state sent more newcomers into San Mateo County, CA than New York, which accounted for 423 households and $102.59M in reported AGI.
Inbound (reported)
$3.32B
19,373 households · 28,997 people
Outbound (reported)
$4.01B
21,581 households · 34,007 people
Net (reported)
-$681.64M
-2,208 households · -5,010 people
States sending newcomers
Shaded by reported AGI coming from each state. Hover a state for numbers. County-to-county detail below.
Top origin counties
| County | Households | People | Reported AGI |
|---|---|---|---|
| Santa Clara County, CA | 3,879 | 5,845 | $975.65M |
| San Francisco County, CA | 4,514 | 7,071 | $798.93M |
| Alameda County, CA | 2,026 | 3,205 | $301.63M |
| Los Angeles County, CA | 977 | 1,347 | $139.43M |
| Contra Costa County, CA | 839 | 1,317 | $100.95M |
| King County, WA | 329 | 458 | $77.01M |
| New York County, NY | 202 | 279 | $68.00M |
| San Diego County, CA | 439 | 608 | $50.66M |
| Orange County, CA | 325 | 444 | $42.26M |
| Marin County, CA | 182 | 246 | $40.19M |
| Cook County, IL | 200 | 277 | $33.66M |
| Sacramento County, CA | 352 | 550 | $28.47M |
| Middlesex County, MA | 156 | 216 | $24.73M |
| Solano County, CA | 206 | 311 | $19.62M |
| Sonoma County, CA | 182 | 253 | $19.28M |
| Kings County, NY | 86 | 114 | $17.90M |
| Clark County, NV | 137 | 206 | $17.72M |
| Washoe County, NV | 72 | 104 | $17.51M |
| San Joaquin County, CA | 245 | 412 | $17.05M |
| Santa Cruz County, CA | 119 | 156 | $16.44M |
“Where newcomers came from” excludes moves within San Mateo County, CA itself. Switch to outbound to see the other direction.