Popularity in the United States (by decade)
Numbers
| Dennis (masculine) | Dennis (feminine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | #660 | 0.022 | - | - | ||
| 2010 | #487 | 0.030 | - | - | ||
| 2000 | #307 | 0.049 | - | - | ||
| 1990 | #178 | 0.088 | - | - | ||
| 1980 | #98 | 0.158 | - | - | ||
| 1970 | #59 | 0.296 | - | - | ||
| 1960 | #39 | 0.484 | #1802 | 0.002 | ||
| 1950 | #21 | 0.995 | #1427 | 0.003 | ||
| 1940 | #20 | 1.070 | #1224 | 0.003 | ||
| 1930 | #71 | 0.243 | - | - | ||
| 1920 | #174 | 0.072 | - | - | ||
| 1910 | #204 | 0.060 | - | - | ||
| 1900 | #188 | 0.067 | - | - | ||
| 1890 | #162 | 0.075 | - | - | ||
| 1880 | #122 | 0.094 | - | - | ||
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