Sinclair is a distinctive girls' name in United States, ranking #8565 in 2011 with 14 recorded births. The name reached its all-time peak in 2025 with 29 births ranking #4740. Since 1996, the popularity has decreased by 22.2%. In 2011, approximately 1 in every 125,629 girls born was named Sinclair. RISING Recent data shows the name is currently rising.