Oslo is a distinctive boys' name in United States, ranking #1969 in 2025 with 78 recorded births. This places Oslo in the top 14% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2022 with 94 births ranking #1767. In 2025, approximately 1 in every 21,898 boys born was named Oslo. FALLING Recent data shows the name is currently falling.