Hebrew Yitzchaq, "he laughs" — he will laugh. Named for Sarah's laughter when she was told she would bear a son at ninety.
Isaac ranks 47th among American boys in 2025, with 5,963 born that year. Its best year was 2007, when 10,287 babies were given the name, ranking 41st. The typical living American called Isaac is about 18 years old today. It is relatively most common in District of Columbia, where it accounts for 0.51% 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.