Popularity in the United States (by decade)
Numbers
| Lillian (feminine) | Lillian (masculine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | #50 | 0.239 | - | - | ||
| 2010 | #26 | 0.338 | - | - | ||
| 2000 | #52 | 0.243 | - | - | ||
| 1990 | #246 | 0.057 | - | - | ||
| 1980 | #419 | 0.029 | - | - | ||
| 1970 | #402 | 0.033 | - | - | ||
| 1960 | #278 | 0.056 | - | - | ||
| 1950 | #194 | 0.084 | - | - | ||
| 1940 | #126 | 0.150 | - | - | ||
| 1930 | #57 | 0.339 | #1463 | 0.002 | ||
| 1920 | #25 | 0.671 | #1247 | 0.003 | ||
| 1910 | #15 | 0.892 | #1167 | 0.004 | ||
| 1900 | #13 | 1.047 | #694 | 0.009 | ||
| 1890 | #16 | 1.024 | #663 | 0.008 | ||
| 1880 | #26 | 0.805 | #945 | 0.003 | ||
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