Sinjin is a distinctive boys' name in United States, ranking #10457 in 2015 with 7 recorded births. The name reached its all-time peak in 1997 with 21 births ranking #3436. Since 1996, the popularity has decreased by 63.2%. In 2015, approximately 1 in every 273,751 boys born was named Sinjin. STABLE Recent data shows the name is currently stable.