Theodore Boy
How popular is Theodore?
#4 boy name in 2025
13,355 baby boys were named Theodore in the US in 2025, making it the 4th most popular boy name. Another 7 girls got the name (#11,928 for girls).
Theodore popularity over time
Boys Girls
| Rank in 2025 | #4 for boys |
|---|---|
| Babies in 2025 | 13,355 boys, 7 girls |
| 10-year trend | Rising fast (+221% babies vs 2015) |
| Earlier ranks | #99 in 2015, #23 in 2020 |
| Peak year | 2025 (13,355 boys) |
| Highest rank | #4 in 2024 (2 years at that rank) |
| First recorded | 1880 |
| Boys vs girls (last 10 years) | 100% boys, 0% girls |
| Chance a classmate shares it | 9% in a class of 25 kids born in 2025 |
Theodore counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Theodore family of names ranked #6 for boys in 2025 (#7 the year before), with 13,431 babies in all.
| Spelling | Boys in 2025 | Share |
|---|---|---|
| Theodore | 13,355 | 99% |
| Theodor | 76 | 1% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Theodore is most popular
Babies named Theodore per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
- Vermont: 22.9 per 1,000 (144 boys)
- New Hampshire: 19.6 per 1,000 (436 boys)
- Maine: 18.6 per 1,000 (360 boys)
- District of Columbia: 18.1 per 1,000 (267 boys)
- Alaska: 16.2 per 1,000 (193 boys)
Theodore by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1880s | 2,176 | #69 |
| 1890s | 2,300 | #75 |
| 1900s | 6,490 | #30 |
| 1910s | 21,106 | #52 |
| 1920s | 31,287 | #62 |
| 1930s | 24,957 | #67 |
| 1940s | 26,249 | #90 |
| 1950s | 29,050 | #99 |
| 1960s | 21,288 | #142 |
| 1970s | 13,567 | #160 |
| 1980s | 11,958 | #200 |
| 1990s | 10,113 | #233 |
| 2000s | 10,556 | #276 |
| 2010s | 40,530 | #36 |
| 2020s | 65,579 | #4 |
Boy names about as popular as Theodore
Questions
- Is Theodore a boy or girl name?
- Theodore is mostly a boy name. Over the last 10 years, 100% of babies named Theodore were boys.
- How popular is the name Theodore?
- 13,355 baby boys were named Theodore in the US in 2025, making it the 4th most popular boy name. Another 7 girls got the name (#11,928 for girls).
- When was Theodore most popular?
- Theodore peaked in 2025, when 13,355 boys were given the name. Its highest rank was #4, held for 2 years starting in 2024.
- How many people are named Theodore?
- 318,175 babies have been named Theodore in the US since 1880. We estimate about 204,679 of them are alive in 2026, with a median age of 14.
- Where is Theodore most popular?
- From 2021 to 2025, Theodore was most common in Vermont, at 22.9 of every 1,000 boys born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.