Greg has been given to about 77,849 people in the United States since 1880. It was most common in 1961, which makes it a boomer-era name.
Its best year was 1961, when 5,409 babies were given the name, ranking 77th. The typical living American called Greg is about 63 years old today. It is relatively most common in California, where it accounts for 0.00% 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.