Sinjin is a distinctive boys' name in United States, ranking #8769 in 2012 with 9 recorded births. The name reached its all-time peak in 1997 with 21 births ranking #3436. Since 1996, the popularity has decreased by 52.6%. In 2012, approximately 1 in every 210,736 boys born was named Sinjin. STABLE Recent data shows the name is currently stable.