Seamus is a distinctive boys' name in United States, ranking #1280 in 2025 with 154 recorded births. This places Seamus in the top 9% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2008 with 298 births ranking #753. In 2025, approximately 1 in every 11,091 boys born was named Seamus. RISING Recent data shows the name is currently rising.