Mckinsey is a distinctive girls' name in United States, ranking #3796 in 1998 with 31 recorded births. The name reached its all-time peak in 2006 with 55 births ranking #3075. Since 1996, the popularity has decreased by 26.2%. In 1998, approximately 1 in every 56,996 girls born was named Mckinsey. FALLING Recent data shows the name is currently falling.