Feminine dossier · first seen 1880
Thea
Stable
Cross-generational persistence
Peak era
2018
Peak births
1,209
Current vitality
Fragile
Peak generation
Gen Alpha
Quick answers about Thea
How many people are named Thea?
An estimated 18,051 living Americans are named Thea.
How rare is Thea?
Thea is moderately uncommon among babies today, with 867 girls receiving the name in 2025, down 28.3% from its 2018 peak.
How old is the typical Thea?
The median age of a living American named Thea is approximately 9 years, with most bearers falling between 5 and 26 years old.
Is Thea still popular?
Yes. Thea is holding steady, with 867 births in 2025 and a consistent recent baseline.
Where is Thea most common?
Thea has its strongest geographic signal in North Dakota, where it appears 4.9× more often than the national baseline.
1880Peak 20182025
Peak year
2018
Decline from peak
28.3%
2025
867
All-time
20,113
Where it lives now
Thea is most concentrated in Nebraska — about 3.5× the national rate in the 2020s.
States where Thea is given more often than the national average — its present-day heartland.