Joslin is a distinctive girls' name in United States, ranking #4536 in 2015 with 31 recorded births. The name reached its all-time peak in 2010 with 67 births ranking #2677. Since 1996, the popularity has increased by 47.6%. In 2015, approximately 1 in every 57,569 girls born was named Joslin. FALLING Recent data shows the name is currently falling.