Sinclair is a distinctive boys' name in United States, ranking #10806 in 2009 with 7 recorded births. The name reached its all-time peak in 2025 with 14 births ranking #6400. Since 1996, the popularity has decreased by 41.7%. In 2009, approximately 1 in every 283,329 boys born was named Sinclair. RISING Recent data shows the name is currently rising.