Flo has been given to about 2,094 people in the United States since 1880. It was most common in 1917, which makes it a Edwardian name.
Its best year was 1917, when 57 babies were given the name, ranking 919th. The typical living American called Flo is about 84 years old today.
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.