Io
- #14,942 for girls in 2025, 5 births
- #12,008 for boys in 2025, 5 births
- Given to girls 84.1% of the time
Showing
- Peak · girls
- 2022 · 18 births
- Debut · girls
- 5 births
- In top 100 · girls
- neverof 146 years
- Total births · girls
- 190since 2000
Io over time
girlsboys
Rank within each sex, plotted together. Click any year to open it.
Hover or use arrow keys to read values by year; click or press Enter to open that year.
Gaps mean fewer than 5 babies received the name that year, so the SSA doesn't publish it.
Show data table
| Year | girls | boys | ||
|---|---|---|---|---|
| rank | births | rank | births | |
| 2025 | #14,942 | 5 | #12,008 | 5 |
| 2024 | — | — | ||
| 2023 | #9,616 | 10 | #12,239 | 5 |
| 2022 | #6,464 | 18 | #10,863 | 6 |
| 2021 | #7,250 | 15 | — | |
| 2020 | #8,953 | 11 | #9,554 | 7 |
| 2019 | #13,799 | 6 | — | |
| 2018 | #9,151 | 11 | — | |
| 2017 | #12,713 | 7 | — | |
| 2016 | #7,230 | 16 | — | |
| 2015 | #16,419 | 5 | #10,644 | 6 |
| 2014 | #8,966 | 12 | #9,642 | 7 |
| 2013 | #9,036 | 12 | — | |
| 2012 | #9,109 | 12 | — | |
| 2011 | #11,181 | 9 | — | |
| 2010 | #14,959 | 6 | — | |
| 2009 | #12,429 | 8 | — | |
| 2008 | #17,504 | 5 | — | |
| 2007 | #17,636 | 5 | — | |
| 2006 | #17,168 | 5 | — | |
| 2005 | — | — | ||
| 2004 | #12,761 | 7 | — | |
| 2003 | — | — | ||
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| 2000 | #15,031 | 5 | — | |
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First appearance
2000
The first year at least five girls were named Io! It came in at #15,031, and was given to 5 baby girls.
Quietest stretch: 2000–2003, when fewer than 6 girls a year got the name.
Where Io is popular in 2025
No state had 5 or more girls named Io in 2025, so the SSA doesn't publish it for any state.
See more about Io
Momentum · girls
Falling
- 5,989 spots since 2020 (#8,953 → #14,942)
- 1,477 spots since 2015 (#16,419 → #14,942)
Rise & fade · girls
22 yrs to peak
- Debuted 2000
- Peaked 2022 at #6,464 (18 births)
- Births halved by 2024, 2 yrs later
Top of the charts · girls
Never in the top 1,000
- Top 10: never
- Top 100: never
- Top 1,000: never
Share of babies · girls
1 in 91,118
- Highest: 1 in 91,118 girls born in 2022 were named Io (0.00%)
- Latest: 1 in 321,453 girls born in 2025 (0.00%)
Era · girls
The 2010s
- 50.5% of all girls named Io (96) were born in this decade
Girls or boys?
Flipped in 2016
- Mostly boys until 2015, mostly girls since
Show by decade
| Decade | Births | Best rank | Avg rank |
|---|---|---|---|
| 2000s | 35 | #12,429 (2009) | #15,422 |
| 2010s | 96 | #7,230 (2016) | #11,256 |
| 2020s | 59 | #6,464 (2022) | #9,445 |
All figures count published births only (names given to at least 5 girls in a year). Registrations before 1937 are incomplete, so early shares and totals run low.
Want to check a specific year?
See where Io ranked and which names it was up against. Click a point on the chart, or pick a year: