Girls' name · peaked in 2018
Thea name popularity since 1925
19,563 babies born in the US from 1925 to 2025 were named Thea. Half of them were born in 2016 or earlier, so the typical Thea is about 10 years old in 2026. Thea peaked in 2018 as the #273 name for girls, and it ranked #353 in 2025.
Key facts
- US babies since 1925
- 19,563
- Named Thea, 1925–2025
- In 2025
- #353
- for girls in 2025 (867 babies)
- Girls / boys
- 100.0% girls
- 19,563 girls · 0 boys
- Most popular in
- Utah
- 2.48× its national share
Peak year is the year Thea made up the largest share of US girls, in records going back to 1880. Typical age is based on births from 1925 on, not on who is living today.
Thea births per year, 1925–2025
2018 was the biggest year for Thea both by count and as a share of all babies.
- Fastest rise: Between 2011 and 2016, Thea became 7.6× more common, from 1 in 12,000 baby girls to 1 in 1,580.
Shaded on the chart. This compares Thea's share of all US girls five years apart, counting only years with at least 100 babies named Thea.
Decade by decade
Babies named Thea in each decade, and its rank among girls' names in the middle year of the decade (1935, 1945 … 2025).
| Decade | Girls | Rank |
|---|---|---|
| 1925–29 | 139 | – |
| 1930s | 207 | #1,657 |
| 1940s | 431 | #1,447 |
| 1950s | 1,027 | #838 |
| 1960s | 1,099 | #938 |
| 1970s | 1,008 | #1,227 |
| 1980s | 1,022 | #1,521 |
| 1990s | 952 | #2,048 |
| 2000s | 1,362 | #1,573 |
| 2010s | 6,408 | #464 |
| 2020–25 | 5,908 | #353 |
Ranks count every name given to at least 5 girls that year, so they can go past 1,000.
Generation fingerprint
60.5% of babies named Thea from 1925 to 2025 were born in the Gen Alpha years (2013–2025). The full split by generation:
Where Thea is most popular
The index compares Thea's share of babies in each state with its share nationwide, 1925–2025 (1.50× = 50% more common). States with at least 300 babies named Thea.
| State | Index | Babies |
|---|---|---|
| Utah | 2.48× | 322 |
| Minnesota | 2.09× | 580 |
| Washington | 1.91× | 487 |
| Colorado | 1.74× | 327 |
| Wisconsin | 1.38× | 415 |
Other spellings
Spellings that sound like Thea and were given to at least 1,000 girls from 1925 to 2025, with the year each one was most popular.
| Spelling | Girls | Peak year |
|---|---|---|
| Thea (this page) | 19,563 | 2018 |
| Tea | 2,493 | 1998 |
Names with a similar story
Of the other 1999 names on this site, these six had the share of babies closest in shape to Thea's from 1925 to 2025, however common each one got. Each line is scaled to its own high; the dashed line is Thea.
Names from the same era
Other common names that peaked within two years of Thea (2018).
Source: U.S. Social Security Administration national and state baby-name data, which covers names given to at least 5 babies of one sex in a year. About the data