Orange County - Percent Population Change, 1800-2000
| Year | 1850 | | % Pop. Chg. | -2.07010368 |
| Year | 1860 | | % Pop. Chg. | -6.74457796 |
| Year | 1870 | | % Pop. Chg. | -9.29090552 |
| Year | 1880 | | % Pop. Chg. | 1.88393244 |
| Year | 1890 | | % Pop. Chg. | -16.79064825 |
| Year | 1900 | | % Pop. Chg. | -1.33844189 |
| Year | 1910 | | % Pop. Chg. | -3.15849428 |
| Year | 1920 | | % Pop. Chg. | -7.6137518 |
| Year | 1930 | | % Pop. Chg. | -3.38561259 |
| Year | 1940 | | % Pop. Chg. | 2.12052234 |
| Year | 1950 | | % Pop. Chg. | -0.1231816 |
| Year | 1960 | | % Pop. Chg. | -5.94937452 |
| Year | 1970 | | % Pop. Chg. | 10.37841888 |
| Year | 1980 | | % Pop. Chg. | 28.64335823 |
| Year | 1990 | | % Pop. Chg. | 14.99626193 |
| Year | 2000 | | % Pop. Chg. | 7.94294237 |
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