Cosette has been given to about 3,080 people in the United States since 1880. It was most common in 2015, which makes it a current name.
Its best year was 2015, when 141 babies were given the name, ranking 1554th. The typical living American called Cosette is about 14 years old today. It is relatively most common in Utah, where it accounts for 0.05% 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.