Isabel has been given to about 133,977 people in the United States since 1880. It was most common in 2006, which makes it a millennial-parent name.
Isabel ranks 177th among American girls in 2025, with 1,746 born that year. Its best year was 2006, when 4,019 babies were given the name, ranking 87th. The typical living American called Isabel is about 22 years old today. It is relatively most common in District of Columbia, where it accounts for 0.20% 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.