San Diego County, California Population 2019
San Diego County, California's estimated population is 3,325,468 with a growth rate of 0.46% in the past year according to the most recent United States census data. San Diego County, California is the 2nd largest county in California.
| Year | Population | Growth | Growth Rate |
| 2018 | 3,343,364 | 17,896 | 0.54% |
| 2017 | 3,325,468 | 15,188 | 0.46% |
| 2016 | 3,310,280 | 26,219 | 0.80% |
| 2015 | 3,284,061 | 33,068 | 1.02% |
| 2014 | 3,250,993 | 39,745 | 1.24% |
| 2013 | 3,211,248 | 36,047 | 1.14% |
| 2012 | 3,175,201 | 37,829 | 1.21% |
| 2011 | 3,137,372 | 34,066 | 1.10% |
| 2010 | 3,103,306 | 605,290 | 24.23% |
| 1990 | 2,498,016 | 636,170 | 34.17% |
| 1980 | 1,861,846 | 503,992 | 37.12% |
| 1970 | 1,357,854 | 324,843 | 31.45% |
| 1960 | 1,033,011 | 476,203 | 85.52% |
| 1950 | 556,808 | 267,460 | 92.44% |
| 1940 | 289,348 | 79,689 | 38.01% |
| 1930 | 209,659 | 97,411 | 86.78% |
| 1920 | 112,248 | 50,583 | 82.03% |
| 1910 | 61,665 | 26,575 | 75.73% |
| 1900 | 35,090 | 103 | 0.29% |
| 1890 | 34,987 | 26,369 | 305.98% |
| 1880 | 8,618 | 3,667 | 74.07% |
| 1870 | 4,951 | 627 | 14.50% |
| 1860 | 4,324 | 3,526 | 441.85% |
| 1850 | 798 | 0.00% |