Sinclair is a distinctive girls' name in United States, ranking #10696 in 2008 with 11 recorded births. The name reached its all-time peak in 2025 with 29 births ranking #4740. Since 1996, the popularity has decreased by 38.9%. In 2008, approximately 1 in every 171,883 girls born was named Sinclair. RISING Recent data shows the name is currently rising.