Fallon has been given to about 12,253 people in the United States since 1880. It was most common in 1982, which makes it a Gen X and millennial name.
Fallon ranks 779th among American girls in 2025, with 364 born that year. Its best year was 1982, when 618 babies were given the name, ranking 376th. The typical living American called Fallon is about 22 years old today. It is relatively most common in West Virginia, where it accounts for 0.08% 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.