Sinjin is a distinctive boys' name in United States, ranking #5624 in 2001 with 13 recorded births. The name reached its all-time peak in 1997 with 21 births ranking #3436. Since 1996, the popularity has decreased by 31.6%. In 2001, approximately 1 in every 149,449 boys born was named Sinjin. STABLE Recent data shows the name is currently stable.