Sinclair is a distinctive girls' name in United States, ranking #12918 in 2014 with 8 recorded births. The name reached its all-time peak in 2025 with 29 births ranking #4740. Since 1996, the popularity has decreased by 55.6%. In 2014, approximately 1 in every 223,242 girls born was named Sinclair. RISING Recent data shows the name is currently rising.