Mckinsey is a distinctive girls' name in United States, ranking #3691 in 1999 with 33 recorded births. The name reached its all-time peak in 2006 with 55 births ranking #3075. Since 1996, the popularity has decreased by 21.4%. In 1999, approximately 1 in every 53,751 girls born was named Mckinsey. FALLING Recent data shows the name is currently falling.