Popularity in the United States (by decade)
Numbers
| Erin (feminine) | Erin (masculine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | #545 | 0.031 | - | - | ||
| 2010 | #307 | 0.054 | - | - | ||
| 2000 | #98 | 0.164 | #1634 | 0.004 | ||
| 1990 | #50 | 0.333 | #849 | 0.008 | ||
| 1980 | #28 | 0.627 | #603 | 0.011 | ||
| 1970 | #39 | 0.412 | #474 | 0.017 | ||
| 1960 | #216 | 0.082 | #775 | 0.005 | ||
| 1950 | #428 | 0.022 | #1689 | 0.001 | ||
| 1940 | #1125 | 0.004 | - | - | ||
| 1930 | #1779 | 0.002 | - | - | ||
| 1920 | - | - | - | - | ||
| 1910 | #1445 | 0.002 | - | - | ||
| 1900 | #1389 | 0.003 | - | - | ||
| 1890 | #1352 | 0.002 | - | - | ||
| 1880 | #1507 | 0.001 | - | - | ||
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