Sinclair is a distinctive girls' name in United States, ranking #10896 in 2013 with 10 recorded births. The name reached its all-time peak in 2025 with 29 births ranking #4740. Since 1996, the popularity has decreased by 44.4%. In 2013, approximately 1 in every 175,441 girls born was named Sinclair. RISING Recent data shows the name is currently rising.