Rainier is a distinctive boys' name in United States, ranking #5568 in 1997 with 11 recorded births. This places Rainier in the bottom 49% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2023 with 41 births ranking #3045. Since 1996, the popularity has increased by 22.2%. In 1997, approximately 1 in every 171,372 boys born was named Rainier. FALLING Recent data shows the name is currently falling.