Diamond has been given to about 36,297 people in the United States since 1880. It was most common in 1999, which makes it a Gen X and millennial name.
Its best year was 1999, when 2,210 babies were given the name, ranking 150th. The typical living American called Diamond is about 27 years old today. It is relatively most common in Tennessee, where it accounts for 0.01% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.