Sullivan
Quick answers about Sullivan
How many people are named Sullivan?
An estimated 14,872 living Americans are named Sullivan.
How rare is Sullivan?
Sullivan is moderately uncommon among babies today, with 1,083 boys receiving the name in 2025, matching its recorded peak.
How old is the typical Sullivan?
The median age of a living American named Sullivan is approximately 9 years, with most bearers falling between 4 and 15 years old.
Is Sullivan still popular?
Yes — Sullivan is currently rising in popularity, with 1,083 births in 2025. Births this decade are running about 2× higher than the previous decade.
Where is Sullivan most common?
Sullivan has its strongest geographic signal in Maine, where it appears 4.8× more often than the national baseline.
Sullivan is most concentrated in Maine — about 4.8× the national rate in the 2020s.
States where Sullivan is given more often than the national average — its present-day heartland.