Sullivan is a moderately popular boys' name in United States, ranking #314 in 2025 with 1,083 recorded births. The name reached its all-time peak in 2025 with 1,083 births ranking #314. Since 1996, the popularity has increased by 1,516.4%. In 2025, approximately 1 in every 1,577 boys born was named Sullivan. RISING Recent data shows the name is currently rising.