Trinity has been given to about 88,192 people in the United States since 1880. It was most common in 2004, which makes it a millennial-parent name.
Trinity ranks 428th among American girls in 2025, with 734 born that year. Its best year was 2004, when 5,729 babies were given the name, ranking 48th. The typical living American called Trinity is about 19 years old today. It is relatively most common in Alaska, where it accounts for 0.13% 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.