Isadora
#1,261 in the US in 2025
Isadora in the United States
Between 2016 and 2025 the name has been rising — up 42% as a share of girls' births.
SOURCE·US Social Security Administration, national baby-name data·Public domain. SSA lists a name only if it was given to at least 5 babies of that sex that year.·REVIEWED JUL 2026
Isadora in New Zealand
Isadora never reached 10 births in a single year in New Zealand, so it does not appear in the DIA file. That is a reporting floor, not a zero — the name may still have been registered here, just never ten times in one year.
SOURCE·NZ Department of Internal Affairs, births by first name·CC BY 4.0. DIA lists a name only if it was given to at least 10 babies of that sex that year.·REVIEWED JUL 2026
Decade by decade in the US
| Year | Rank | Births |
|---|---|---|
| 1880 | #836 | 5 |
| 1890 | #940 | 9 |
| 1900 | #970 | 15 |
| 1910 | #2,140 | 6 |
| 1920 | #2,590 | 13 |
| 1930 | #2,845 | 10 |
| 1940 | #2,297 | 13 |
| 1950 | #4,315 | 7 |
| 1960 | below floor | — |
| 1970 | #6,362 | 7 |
| 1980 | #6,319 | 10 |
| 1990 | #5,060 | 18 |
| 2000 | #3,271 | 41 |
| 2010 | #1,713 | 122 |
| 2020 | #1,308 | 168 |
Where in the United States
The states that registered Isadora most often since 1880. These are lifetime totals, so they track state population as much as local taste — a name common in Wyoming will never out-count California.
| State | Births |
|---|---|
| California | 457 |
| New York | 326 |
| Massachusetts | 247 |
| Florida | 234 |
| Texas | 216 |
| Michigan | 91 |
| Illinois | 84 |
| Washington | 71 |
| Pennsylvania | 70 |
| New Jersey | 64 |
How these figures are worked out
- Counts come straight from the registrars: the US Social Security Administration (1880–2025) and the New Zealand Department of Internal Affairs (1900–2025). Nothing is scraped from another names site.
- Ranks are computed against every name in that year's file, not just the ones this site publishes pages for — otherwise a rank would flatter every name we happen to list.
- The curve is drawn on births per 100,000 of that sex, not raw counts. Raw counts across eras are misleading: far more births were registered in 1957 than in 1890, so a flat count is a falling share.
- Each country hides small numbers — the US below 5 births a year, New Zealand below 10. A gap in a line is "below the floor", never "nobody".
SOURCE·US SSA (1880–2025) + NZ DIA (1900–2025) birth registrations·ranks and shares computed from the source files, see method·REVIEWED JUL 2026