Popularity in the United States (by decade)
Numbers
| Gladys (feminine) | Gladys (masculine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | - | - | - | - | ||
| 2010 | - | - | - | - | ||
| 2000 | #1264 | 0.009 | - | - | ||
| 1990 | #743 | 0.015 | - | - | ||
| 1980 | #707 | 0.014 | - | - | ||
| 1970 | #602 | 0.017 | - | - | ||
| 1960 | #388 | 0.031 | - | - | ||
| 1950 | #232 | 0.062 | - | - | ||
| 1940 | #143 | 0.128 | - | - | ||
| 1930 | #68 | 0.315 | #1497 | 0.002 | ||
| 1920 | #31 | 0.585 | #1509 | 0.002 | ||
| 1910 | #21 | 0.773 | #1163 | 0.004 | ||
| 1900 | #14 | 0.975 | #675 | 0.009 | ||
| 1890 | #43 | 0.579 | #1088 | 0.003 | ||
| 1880 | #151 | 0.101 | - | - | ||
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