Sullivan is a moderately popular boys' name in United States, ranking #372 in 2021 with 876 recorded births. The name reached its all-time peak in 2024 with 1,011 births ranking #339. Since 1996, the popularity has increased by 1,207.5%. In 2021, approximately 1 in every 1,996 boys born was named Sullivan. RISING Recent data shows the name is currently rising.