Popularity in the United States (by decade)
Numbers
| Hartley (feminine) | Hartley (masculine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | #1785 | 0.006 | - | - | ||
| 2010 | #1740 | 0.006 | - | - | ||
| 2000 | - | - | - | - | ||
| 1990 | - | - | - | - | ||
| 1980 | - | - | - | - | ||
| 1970 | - | - | - | - | ||
| 1960 | - | - | - | - | ||
| 1950 | - | - | - | - | ||
| 1940 | - | - | #1654 | 0.001 | ||
| 1930 | - | - | #1441 | 0.002 | ||
| 1920 | - | - | #1422 | 0.002 | ||
| 1910 | - | - | #1421 | 0.003 | ||
| 1900 | - | - | #1433 | 0.002 | ||
| 1890 | - | - | #1300 | 0.002 | ||
| 1880 | - | - | - | - | ||
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