Theta
Every Theta since 1907 — 402 of them. Popularity, births, and rankings for each year, from official Social Security records.
The story of Theta
Theta is not currently in use for newborns in the United States — fewer than five babies received the name in 2025. Its story lives in the historical record below.
Since 1907, 402 American babies have been named Theta. Its peak came in 1907, when 20 newborns received the name — the signature sound of the 1900s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Theta stood among all girls' names in any year, or use the compare tool to plot it against other names.
Theta year by year
Every year since 2001, and five-year steps back to 1880. Rank is within each sex.
| Year | Girls | Girls rank |
|---|---|---|
| 2025 | — | — |
| 2024 | — | — |
| 2023 | — | — |
| 2022 | — | — |
| 2021 | — | — |
| 2020 | — | — |
| 2019 | — | — |
| 2018 | — | — |
| 2017 | — | — |
| 2016 | — | — |
| 2015 | 5 | #18,872 |
| 2014 | — | — |
| 2013 | — | — |
| 2012 | — | — |
| 2011 | — | — |
| 2010 | — | — |
| 2009 | — | — |
| 2008 | — | — |
| 2007 | — | — |
| 2006 | — | — |
| 2005 | — | — |
| 2004 | — | — |
| 2003 | — | — |
| 2002 | — | — |
| 2001 | — | — |
| 2000 | — | — |
| 1995 | — | — |
| 1990 | — | — |
| 1985 | — | — |
| 1980 | — | — |
| 1975 | — | — |
| 1970 | — | — |
| 1965 | — | — |
| 1960 | 6 | #6,335 |
| 1955 | — | — |
| 1950 | 7 | #4,698 |
| 1945 | 6 | #4,511 |
| 1940 | 9 | #3,188 |
| 1935 | 14 | #2,296 |
| 1930 | 11 | #2,826 |
| 1925 | 6 | #4,909 |
| 1920 | — | — |
| 1915 | — | — |
| 1910 | 7 | #2,121 |
| 1905 | — | — |
| 1900 | — | — |
| 1895 | — | — |
| 1890 | — | — |
| 1885 | — | — |
| 1880 | — | — |
Frequently asked questions
How popular is the name Theta in 2025?
Theta did not appear in the 2025 Social Security data, which means fewer than five babies received the name that year.
How many people are named Theta?
402 babies have been named Theta in the United States since 1907, based on Social Security card applications.
When was the name Theta most popular?
Theta peaked in 1907, when 20 newborns received the name.
Is Theta a boy or girl name?
Theta is overwhelmingly a girl's name — 100% of babies with the name.
Is the name Theta rising or falling?
Theta is declining — less popular now than a decade ago.