Historical Population
| Year | Lake | Marin | Mendocino | Napa | Solano | Sonoma |
|---|---|---|---|---|---|---|
| 1850 | (Napa) |
323 |
55 |
405 |
580 |
560 |
| 1860 | (Napa) |
3,334 |
3,967 |
5,521 |
7,169 |
11,867 |
| 1870 | 2,969 |
6,903 |
7,545 |
7,163 |
16,871 |
19,819 |
| 1880 | 6,596 |
11,324 |
12,800 |
13,235 |
18,475 |
25,926 |
| 1890 | 7,101 |
13,072 |
17,612 |
16,411 |
20,946 |
32,721 |
| 1900 | 6,017 |
15,702 |
20,465 |
16,451 |
24,143 |
38,480 |
| 1910 | 5,526 |
25,114 |
23,929 |
19,800 |
27,559 |
48,394 |
| 1920 | 5,402 |
27,342 |
24,116 |
20,678 |
40,602 |
52,090 |
| 1930 | 7,166 |
41,648 |
23,505 |
22,879 |
40,834 |
62,222 |
| 1940 | 8,069 |
52,907 |
27,864 |
28,503 |
49,118 |
69,052 |
| 1950 | 11,481 |
85,619 |
40,854 |
46,603 |
104,833 |
103,405 |
| 1960 | 13,786 |
146,820 |
51,059 |
65,890 |
134,597 |
147,375 |
| 1970 | 19,548 |
208,652 |
51,101 |
79,140 |
169,941 |
204,885 |
| 1980 | 36,366 |
222,568 |
66,738 |
99,199 |
235,203 |
299,681 |
| 1990 | 50,631 |
230,096 |
80,345 |
110,765 |
339,471 |
388,222 |
| 2000 | 58,309 |
247,289 |
86,265 |
124,279 |
394,542 |
458,614 |
| 2005 | 64,180 |
252,195 |
90,487 |
133,526 |
422,094 |
478,724 |
Sources:
- 1850 - 1980 : U. S. Department of Commerce, Bureau of the Census; Population Abstract of the United States (Ref. HA 202 .A686); Geostat Geospatial and Statistical Data Center.
- 1990 and 2000 E-4 Population Estimates, California Department of Finance
- 2005 provional as of July 1, 2005 E-1 City/County Population , California Department of Finance
