Issac has been given to about 24,571 people in the United States since 1880. It was most common in 2008, which makes it a millennial-parent name.
Issac ranks 915th among American boys in 2025, with 258 born that year. Its best year was 2008, when 820 babies were given the name, ranking 376th. The typical living American called Issac is about 21 years old today. It is relatively most common in Arkansas, where it accounts for 0.04% 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.