Sinclair is a distinctive boys' name in United States, ranking #7953 in 2015 with 10 recorded births. The name reached its all-time peak in 2025 with 14 births ranking #6400. Since 1996, the popularity has decreased by 16.7%. In 2015, approximately 1 in every 191,626 boys born was named Sinclair. RISING Recent data shows the name is currently rising.