Sinjin is a distinctive boys' name in United States, ranking #6085 in 2004 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 2004, approximately 1 in every 152,677 boys born was named Sinjin. STABLE Recent data shows the name is currently stable.