This shows the populations of California, Washington, and Oregon.
| Year | California | Oregon | Washington |
| 1846 | 15000 | | |
| 1850 | 92597 | 12093 | 1201 |
| 1860 | 379994 | 52465 | 11594 |
| 1870 | 560247 | 90923 | 23955 |
| 1880 | 864694 | 174768 | 75116 |
| 1890 | 1213398 | 317704 | 357232 |
| 1900 | 1485053 | 413536 | 518103 |
| 1910 | 2377549 | 672765 | 1141990 |
| 1920 | 3426861 | 783389 | 1356621 |
| 1930 | 5677251 | 953786 | 1563396 |
| 1940 | 6907387 | 1089684 | 1736191 |
| 1950 | 10586223 | 1521341 | 2378963 |
| 1960 | 15717204 | 1768687 | 2853214 |
| 1970 | 19953134 | 2091533 | 3409169 |
| 1980 | 23667902 | 2633105 | 4132156 |
| 1990 | 29760021 | 2842321 | 4866692 |
| 2000 | 33871648 | 3421399 | 5894121 |
| 2010 | 37253956 | 3831074 | 6724540 |
| 2020 | 39538223 | 4237256 | 7705281 |
| 2022 | 39029342 | 4240137 | 7785786 |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
