Popularity in the United States (by decade)
Numbers
| Harold (feminine) | Harold (masculine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | - | - | #939 | 0.013 | ||
| 2010 | - | - | #820 | 0.014 | ||
| 2000 | - | - | #636 | 0.016 | ||
| 1990 | - | - | #417 | 0.027 | ||
| 1980 | - | - | #252 | 0.048 | ||
| 1970 | - | - | #152 | 0.103 | ||
| 1960 | - | - | #99 | 0.187 | ||
| 1950 | - | - | #62 | 0.303 | ||
| 1940 | #1661 | 0.002 | #28 | 0.542 | ||
| 1930 | #1086 | 0.004 | #19 | 0.880 | ||
| 1920 | #817 | 0.007 | #13 | 1.175 | ||
| 1910 | #1002 | 0.004 | #12 | 1.147 | ||
| 1900 | #1692 | 0.002 | #19 | 0.872 | ||
| 1890 | #1578 | 0.001 | #31 | 0.570 | ||
| 1880 | - | - | #84 | 0.170 | ||
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