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Population by County, 1860-2000


  Alameda Contra Costa Marin Napa San Francisco San Mateo Santa Clara Solano Sonoma TOTAL BAY AREA
1860 8,927 5,328 3,334 5,521 56,802 3,214 11,912 7,169 11,867 114,074
1870 24,237 8,461 6,903 7,163 149,473 6,635 26,246 16,871 19,819 265,808
1880 62,976 12,525 11,324 13,235 233,959 8,669 35,039 18,475 25,926 422,128
1890 93,864 13,515 13,072 16,411 298,997 10,087 48,005 20,946 32,721 547,618
1900 130,197 18,046 15,702 16,451 342,782 12,094 60,216 24,143 38,480 658,111
1910 246,131 31,674 25,114 19,800 416,912 26,585 83,539 27,559 48,394 925,708
1920 344,177 53,889 27,342 20,678 506,676 36,781 100,676 40,602 52,090 1,182,911
1930 474,883 78,608 41,648 22,897 634,394 77,405 145,118 40,834 62,222 1,578,009
1940 513,011 100,450 52,907 28,503 634,536 111,782 174,949 49,118 69,052 1,734,308
1950 740,315 298,984 85,619 46,603 775,357 235,659 290,547 104,833 103,405 2,681,322
1960 908,209 409,030 146,820 65,890 740,316 444,387 642,315 134,597 147,375 3,638,939
1970 1,071,446 556,116 208,652 79,140 715,674 557,361 1,065,313 171,989 204,885 4,630,576
1980 1,105,379 656,380 222,568 99,199 678,974 587,329 1,295,071 235,203 299,681 5,179,784
1990 1,279,182 803,732 230,096 110,765 723,959 649,623 1,497,577 340,421 388,222 6,023,577
2000 1,443,741 948,816 247,289 124,279 776,733 707,161 1,682,585 394,542 458,614 6,783,760

Notes: Data is from the U.S. decennial censuses, 1860 to 2000. Data compilation by staff of the Metropolitan Transportation Commissions and the Association of Bay Area Governments.

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Updated October 1, 2003