Trey has been given to about 40,573 people in the United States since 1880. It was most common in 1999, which makes it a Gen X and millennial name.
Trey ranks 890th among American boys in 2025, with 269 born that year. Its best year was 1999, when 1,803 babies were given the name, ranking 189th. The typical living American called Trey is about 25 years old today. It is relatively most common in South Dakota, where it accounts for 0.09% 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.