Deja has been given to about 16,360 people in the United States since 1880. It was most common in 1996, which makes it a Gen X and millennial name.
Its best year was 1996, when 1,647 babies were given the name, ranking 182nd. The typical living American called Deja is about 28 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.