Cosmo is a distinctive boys' name in United States, ranking #1746 in 2023 with 94 recorded births. This places Cosmo in the top 12% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2022 with 99 births ranking #1708. Since 1996, the popularity has increased by 370.0%. In 2023, approximately 1 in every 18,176 boys born was named Cosmo. FALLING Recent data shows the name is currently falling.