Karolyn is a distinctive girls' name in United States, ranking #6436 in 2025 with 18 recorded births. This places Karolyn in the top 37% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1997 with 52 births ranking #2493. Since 1996, the popularity has decreased by 51.4%. In 2025, approximately 1 in every 89,293 girls born was named Karolyn. RISING Recent data shows the name is currently rising.