Sinclair is a distinctive boys' name in United States, ranking #8054 in 2017 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 2017, approximately 1 in every 185,032 boys born was named Sinclair. RISING Recent data shows the name is currently rising.