Rainier is a distinctive girls' name in United States, ranking #17206 in 2022 with 5 recorded births. This places Rainier in the bottom 3% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2019 with 11 births ranking #9601. In 2022, approximately 1 in every 327,752 girls born was named Rainier. RISING Recent data shows the name is currently rising.