Popularity in the United States (by decade)
Numbers
| Jeffrey (feminine) | Jeffrey (masculine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | - | - | #435 | 0.038 | ||
| 2010 | - | - | #283 | 0.063 | ||
| 2000 | - | - | #161 | 0.122 | ||
| 1990 | - | - | #54 | 0.326 | ||
| 1980 | #1441 | 0.005 | #29 | 0.753 | ||
| 1970 | #1213 | 0.006 | #15 | 1.186 | ||
| 1960 | #1147 | 0.005 | #10 | 1.540 | ||
| 1950 | #1702 | 0.002 | #24 | 0.900 | ||
| 1940 | - | - | #88 | 0.227 | ||
| 1930 | - | - | #625 | 0.008 | ||
| 1920 | - | - | #1450 | 0.002 | ||
| 1910 | - | - | #1615 | 0.002 | ||
| 1900 | - | - | - | - | ||
| 1890 | - | - | - | - | ||
| 1880 | - | - | - | - | ||
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