Popularity in the United States (by decade)
Numbers
| Colby (masculine) | Colby (feminine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | #618 | 0.024 | - | - | ||
| 2010 | #417 | 0.036 | - | - | ||
| 2000 | #197 | 0.090 | - | - | ||
| 1990 | #212 | 0.069 | #1394 | 0.006 | ||
| 1980 | #308 | 0.036 | #1420 | 0.005 | ||
| 1970 | #489 | 0.016 | - | - | ||
| 1960 | #1172 | 0.002 | - | - | ||
| 1950 | #1629 | 0.001 | - | - | ||
| 1940 | - | - | - | - | ||
| 1930 | - | - | - | - | ||
| 1920 | - | - | - | - | ||
| 1910 | - | - | - | - | ||
| 1900 | - | - | - | - | ||
| 1890 | - | - | - | - | ||
| 1880 | - | - | - | - | ||
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