Lacy is a distinctive girls' name in United States, ranking #1370 in 2010 with 170 recorded births. The name reached its all-time peak in 2003 with 297 births ranking #826. Since 1996, the popularity has decreased by 38.4%. In 2010, approximately 1 in every 10,455 girls born was named Lacy. RISING Recent data shows the name is currently rising.