Zac has been given to about 1,600 people in the United States since 1880. It was most common in 2014, which makes it a millennial-parent name.
Its best year was 2014, when 84 babies were given the name, ranking 1792nd. The typical living American called Zac is about 14 years old today. It is relatively most common in New Jersey, 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.