Sinjin is a distinctive boys' name in United States, ranking #7168 in 2003 with 10 recorded births. The name reached its all-time peak in 1997 with 21 births ranking #3436. Since 1996, the popularity has decreased by 47.4%. In 2003, approximately 1 in every 197,527 boys born was named Sinjin. STABLE Recent data shows the name is currently stable.