Sinjin is a distinctive boys' name in United States, ranking #5783 in 1998 with 11 recorded births. The name reached its all-time peak in 1997 with 21 births ranking #3436. Since 1996, the popularity has decreased by 42.1%. In 1998, approximately 1 in every 173,756 boys born was named Sinjin. STABLE Recent data shows the name is currently stable.