Theia
Theia was given to 97 girls in 2025, #1,989 among girls’ names; 1,217 Americans have been recorded with it since 1967 (Social Security Administration, published May 2026).
An estimated 1,210 Americans named Theia and born in the U.S. are alive in 2026 (99% of everyone recorded); the median is 7 years old and half are between 3 and 10.
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Theia by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Theia?
#1,989 among girls’ names, 2025
Theia rose from #2,428 in 2015 to #1,989 in 2025 among girls’ names; its share of girls born rose from 42.6 to 60.4 per million.
113 babies in 2019, the peak
Theia peaked in 2019, when 113 girls were given it, #1,813 among girls’ names. The 97 births of 2025 are 86% of that peak.
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2025 | 97 | #1,989 | 60.4 |
| 2024 | 110 | #1,839 | 67.9 |
| 2023 | 98 | #2,016 | 61.1 |
| 2022 | 91 | #2,122 | 55.5 |
| 2021 | 99 | #1,979 | 60.3 |
| 2020 | 77 | #2,315 | 47.6 |
| 2019 | 113 | #1,813 | 67.3 |
| 2018 | 109 | #1,867 | 64.1 |
| 2017 | 112 | #1,841 | 64.9 |
| 2016 | 98 | #2,031 | 55.3 |
Every recorded year (22)
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2015 | 76 | #2,428 | 42.6 |
| 2014 | 42 | #3,708 | 23.5 |
| 2013 | 18 | #7,004 | 10.3 |
| 2012 | 14 | #8,589 | 7.9 |
| 2011 | 17 | #7,399 | 9.7 |
| 2010 | 8 | #13,346 | 4.5 |
| 2009 | 9 | #12,357 | 4.9 |
| 2008 | 6 | #17,321 | 3.2 |
| 2007 | 6 | #17,462 | 3.1 |
| 1989 | 6 | #12,246 | 3.3 |
| 1973 | 5 | #9,679 | 3.4 |
| 1967 | 6 | #6,737 | 3.6 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Theia a boy’s or a girl’s name?
Theia has been recorded only for girls: SSA lists no boys with the name in 22 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Theia: the SSA national file counts each sex separately.
How many people are named Theia, and how old are they?
1,210 alive in 2026, estimated
That is 99% of the 1,217 Americans ever recorded as Theia. The median Theia alive today is 7 years old; half are between 3 and 10.
The 2020 Census counted 673 people named Theia (672 women and girls, 1 man or boy). SSA’s births carried forward to Census day, April 1, 2020, predict 660 born in the U.S. The Census count is 2% above that prediction.
Alive today, by age
Alive today, by generation
| Generation | Born | Alive |
|---|---|---|
| Generation X | 1965-1980 | 10 |
| Millennials | 1981-1996 | 6 |
| Generation Z | 1997-2012 | 60 |
| Generation Alpha | 2013-2025 | 1,130 |
An estimate, not a count. SSA’s files count people born in the United States who received a Social Security number, so anyone born abroad is not in them; before 1937 most people got a number as adults, and their survival is counted from that age.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Where are babies named Theia born?
The states with the most babies named Theia are California, Florida and Minnesota, with 81% of its births recorded by state in 2025; Minnesota is not among the ten states with the most births.
| State | Births 2025 | Rank, girls | vs. national |
|---|---|---|---|
| California | 8 | #2,471 | 0.7× |
| Florida | 7 | #1,869 | 0.7× |
| Minnesota | 6 | #826 | 1.0× |
| Maryland | 5 | #984 | 0.2× |
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among girls’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Theia with the births its national share predicts year by year, for states with at least 100 births of the name.
Names spelled alike
Of these 2 names spelled alike, given to 21,335 babies since 1880, Theia is the second most given (5.7% of them). In 2025 it was given to 97 of their 964 babies (10%), again the second most given.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Theia
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Theia and names like it
- Compare Theia and TheaBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2010sTheia peaked in 2019.
- California’s most given namesThe state where SSA recorded the most babies named Theia since 1910.
- The top names of 2019The year the most babies were named Theia.
- The names of Generation AlphaMost people named Theia alive today were born 2013-2025.
- Names starting with TMost given first.