The story of Karolyn
Karolyn is rare for girls in the United States, ranked #6,436 in 2025 with 18 babies given the name. It is currently declining compared with a decade ago.
Since 1912, 5,957 American babies have been named Karolyn. Its peak came in 1946, when 167 newborns received the name, the signature sound of the 1940s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Karolyn stood among all girls' names in any year, or use the compare tool to plot it against other names.