Popularity in the United States (by decade)
Numbers
| Leo (masculine) | Leo (feminine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | #28 | 0.423 | - | - | ||
| 2010 | #91 | 0.222 | - | - | ||
| 2000 | #271 | 0.058 | - | - | ||
| 1990 | #467 | 0.023 | - | - | ||
| 1980 | #397 | 0.024 | - | - | ||
| 1970 | #342 | 0.031 | - | - | ||
| 1960 | #249 | 0.048 | - | - | ||
| 1950 | #178 | 0.076 | - | - | ||
| 1940 | #138 | 0.112 | - | - | ||
| 1930 | #88 | 0.211 | #1659 | 0.002 | ||
| 1920 | #55 | 0.325 | #1070 | 0.004 | ||
| 1910 | #47 | 0.384 | #971 | 0.005 | ||
| 1900 | #44 | 0.384 | #940 | 0.005 | ||
| 1890 | #43 | 0.381 | #859 | 0.006 | ||
| 1880 | #81 | 0.178 | #867 | 0.004 | ||
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