Oisin is a distinctive boys' name in England & Wales, ranking #517 in 2025 with 75 recorded births. The name reached its all-time peak in 2021 with 96 births ranking #433. Since 1996, the popularity has increased by 435.7%. In 2025, approximately 1 in every 3,626 boys born was named Oisin. RISING Recent data shows the name is currently rising.