In order to determine where people stay put in your home state, Stacker compiled a list of counties with the most born-and-bred residents in California using data from the Census Bureau. Santa Clara County– Population: 1,902,047– Born in California: 840,883 (44.2% of population)– Born in a different state: 241,049 (12.7% of population)– Born in U.S. territories: 30,359 (1.6% of population)– Born in another country: 789,756 (41.5% of population)56. Alameda County– Population: 1,649,473– Born in California: 789,733 (47.9% of population)– Born in a different state: 259,635 (15.7% of population)– Born in U.S. territories: 27,194 (1.6% of population)– Born in another country: 572,911 (34.7% of population)55. Alpine County– Population: 1,616– Born in California: 774 (47.9% of population)– Born in a different state: 747 (46.2% of population)– Born in U.S. territories: 8 (0.5% of population)– Born in another country: 87 (5.4% of population)54. Marin County– Population: 257,969– Born in California: 131,001 (50.8% of population)– Born in a different state: 72,030 (27.9% of population)– Born in U.S. territories: 4,327 (1.7% of population)– Born in another country: 50,611 (19.6% of population)52.