Popularity in the United States (by decade)
Numbers
| Keith (masculine) | Keith (feminine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | #645 | 0.023 | - | - | ||
| 2010 | #427 | 0.035 | - | - | ||
| 2000 | #265 | 0.059 | - | - | ||
| 1990 | #125 | 0.138 | - | - | ||
| 1980 | #63 | 0.274 | - | - | ||
| 1970 | #45 | 0.448 | #1953 | 0.003 | ||
| 1960 | #34 | 0.574 | #1560 | 0.003 | ||
| 1950 | #41 | 0.445 | #1887 | 0.002 | ||
| 1940 | #100 | 0.171 | - | - | ||
| 1930 | #125 | 0.128 | - | - | ||
| 1920 | #148 | 0.096 | - | - | ||
| 1910 | #231 | 0.049 | - | - | ||
| 1900 | #407 | 0.019 | - | - | ||
| 1890 | #743 | 0.007 | - | - | ||
| 1880 | #1304 | 0.001 | - | - | ||
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