Sinclair is a distinctive girls' name in United States, ranking #13764 in 2007 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 2007, approximately 1 in every 240,306 girls born was named Sinclair. RISING Recent data shows the name is currently rising.