Counties sending the most people to San Mateo County, CA

Stacker compiled a list of counties sending the most people to San Mateo County, California using data from the U.S. Census Bureau. Counties and county equivalents are ranked by the estimated number of people who moved to San Mateo County, CA from the county between 2015 and 2019. Ties were broken by gross migration.

#20. Fresno County, California
- Migration from Fresno County, California to San Mateo County, California: 230
- Migration to Fresno County, California in 2015-2019: 237
- Net migration: 7 to Fresno County, California

#19. Solano County, California
- Migration from Solano County, California to San Mateo County, California: 239
- Migration to Solano County, California in 2015-2019: 1,376
- Net migration: 1,137 to Solano County, California

#18. Yolo County, California
- Migration from Yolo County, California to San Mateo County, California: 243
- Migration to Yolo County, California in 2015-2019: 334
- Net migration: 91 to Yolo County, California

#17. Washington, D.C.
- Migration from Washington, D.C. to San Mateo County, California: 251
- Migration to Washington, D.C. in 2015-2019: 153
- Net migration: 98 to San Mateo County, California

#16. Maricopa County, Arizona
- Migration from Maricopa County, Arizona to San Mateo County, California: 271
- Migration to Maricopa County, Arizona in 2015-2019: 443
- Net migration: 172 to Maricopa County, Arizona

#15. Marin County, California
- Migration from Marin County, California to San Mateo County, California: 300
- Migration to Marin County, California in 2015-2019: 561
- Net migration: 261 to Marin County, California

#14. San Luis Obispo County, California
- Migration from San Luis Obispo County, California to San Mateo County, California: 376
- Migration to San Luis Obispo County, California in 2015-2019: 345
- Net migration: 31 to San Mateo County, California

#13. Kings County, New York
- Migration from Kings County, New York to San Mateo County, California: 389
- Migration to Kings County, New York in 2015-2019: 88
- Net migration: 301 to San Mateo County, California

#12. Cook County, Illinois
- Migration from Cook County, Illinois to San Mateo County, California: 406
- Migration to Cook County, Illinois in 2015-2019: 278
- Net migration: 128 to San Mateo County, California

#11. King County, Washington
- Migration from King County, Washington to San Mateo County, California: 474
- Migration to King County, Washington in 2015-2019: 913
- Net migration: 439 to King County, Washington

#10. New York County, New York
- Migration from New York County, New York to San Mateo County, California: 487
- Migration to New York County, New York in 2015-2019: 409
- Net migration: 78 to San Mateo County, California

#9. San Joaquin County, California
- Migration from San Joaquin County, California to San Mateo County, California: 495
- Migration to San Joaquin County, California in 2015-2019: 849
- Net migration: 354 to San Joaquin County, California

#8. Orange County, California
- Migration from Orange County, California to San Mateo County, California: 657
- Migration to Orange County, California in 2015-2019: 509
- Net migration: 148 to San Mateo County, California

#7. Sacramento County, California
- Migration from Sacramento County, California to San Mateo County, California: 937
- Migration to Sacramento County, California in 2015-2019: 1,636
- Net migration: 699 to Sacramento County, California

#6. San Diego County, California
- Migration from San Diego County, California to San Mateo County, California: 1,042
- Migration to San Diego County, California in 2015-2019: 781
- Net migration: 261 to San Mateo County, California

#5. Los Angeles County, California
- Migration from Los Angeles County, California to San Mateo County, California: 1,584
- Migration to Los Angeles County, California in 2015-2019: 1,548
- Net migration: 36 to San Mateo County, California

#4. Contra Costa County, California
- Migration from Contra Costa County, California to San Mateo County, California: 1,614
- Migration to Contra Costa County, California in 2015-2019: 3,067
- Net migration: 1,453 to Contra Costa County, California

#3. Alameda County, California
- Migration from Alameda County, California to San Mateo County, California: 3,275
- Migration to Alameda County, California in 2015-2019: 5,507
- Net migration: 2,232 to Alameda County, California

#2. Santa Clara County, California
- Migration from Santa Clara County, California to San Mateo County, California: 8,249
- Migration to Santa Clara County, California in 2015-2019: 6,094
- Net migration: 2,155 to San Mateo County, California

#1. San Francisco County, California
- Migration from San Francisco County, California to San Mateo County, California: 8,453
- Migration to San Francisco County, California in 2015-2019: 4,214
- Net migration: 4,239 to San Mateo County, California