Popularity in the United States (by decade)
Numbers
| Louis (masculine) | Louis (feminine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | #245 | 0.076 | - | - | ||
| 2010 | #298 | 0.059 | - | - | ||
| 2000 | #309 | 0.048 | - | - | ||
| 1990 | #209 | 0.070 | - | - | ||
| 1980 | #161 | 0.090 | - | - | ||
| 1970 | #136 | 0.118 | - | - | ||
| 1960 | #107 | 0.170 | - | - | ||
| 1950 | #82 | 0.234 | - | - | ||
| 1940 | #56 | 0.326 | #1659 | 0.002 | ||
| 1930 | #43 | 0.440 | #1154 | 0.003 | ||
| 1920 | #29 | 0.595 | #953 | 0.005 | ||
| 1910 | #22 | 0.728 | #998 | 0.004 | ||
| 1900 | #25 | 0.707 | #1056 | 0.004 | ||
| 1890 | #20 | 0.686 | #984 | 0.004 | ||
| 1880 | #19 | 0.703 | #853 | 0.005 | ||
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