Jeffery has been given to about 231,818 people in the United States since 1880. It was most common in 1962, which makes it a boomer-era name.
Its best year was 1962, when 9,331 babies were given the name, ranking 45th. The typical living American called Jeffery is about 58 years old today. It is relatively most common in Missouri, 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.