One subject, in depth · bridged to FuelFacts
NameCurve
Boys' name · 12,705 recorded births

Kairo

#226 in the US in 2025

Where Kairo stands

United States register · 1880–2025

#226boys’ names · US 2025

Kairo was the 226th most registered boys' name in the United States in 2025, on 1,577 births.

peak 2025 · 1,577188019532025

Its moment was 2025, when 1,577 babies were given it.

SOURCE·US Social Security Administration, national baby-name data·Public domain. retrieved from the Internet Archive's 2026 snapshot of ssa.gov (ssa.gov refuses automated requests); files unmodified. SSA lists a name only if it was given to at least 5 babies of that sex that year.·REVIEWED JUL 2026

#226US rank, 2025 (boys)
1,577US births in 2025
#226its best US rank, in 2025
2025peak year — 1,577 births
11,224US births since 1995
222NZ births since 2014
1,259E&W births, 2019–2025
Saved in this browser only — no account, nothing sent anywhere.

How Kairo's figures are worked out

  1. 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. The SSA files are the agency's own, retrieved from the Internet Archive's 2026 snapshot of ssa.gov (ssa.gov refuses automated requests); files unmodified.
  2. 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.
  3. 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.
  4. The reporting floor. Each registrar publishes a name only once it clears a threshold — 5 births of that sex in the US, 10 in New Zealand. Expressed as a share that threshold is itself a curve, and it is drawn on every chart here as the shaded band along the base.
  5. A missing year is a suppressed value, never a zero. Where the registrar published nothing, this site prints “below floor” or “<5”, the curve is broken rather than drawn across the gap, and the missing years are marked on the floor line. Kairo was under the floor in no year of its US record.
share per 100,000 = births ÷ all births of that sex that year × 100,000
reporting floor (share) = 5 ÷ all births of that sex that year × 100,000

Full methodology →

Kairo in the United States

188019001920194019601980200020200.04692
Births per 100,000 of that sex, so eras compare fairly. The shaded band is the 5-birth reporting floor — under it the registrar publishes nothing, so a line that stops has left the record, not fallen to zero. Kairo in the United States, 1880–2025

Between 2016 and 2025 the name has been rising — up 1045% as a share of boys' births.

SOURCE·US Social Security Administration, national baby-name data·Public domain. retrieved from the Internet Archive's 2026 snapshot of ssa.gov (ssa.gov refuses automated requests); files unmodified. SSA lists a name only if it was given to at least 5 babies of that sex that year.·REVIEWED JUL 2026

Kairo in New Zealand

In New Zealand, Kairo has been registered 222 times since 2014, peaking in 2024 with 41 births. It ranked #135 for boys in 2025 on 35 births.

1900192019401960198020002020NOT PUBLISHED — BELOW THE 10-BIRTH FLOOR0.0123246
Births per 100,000 of that sex, so eras compare fairly. The shaded band is the 10-birth reporting floor — under it the registrar publishes nothing, so a line that stops has left the record, not fallen to zero. Kairo in New Zealand, 1900–2025

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

Kairo in England & Wales

In England and Wales, Kairo was registered 1,259 times between 2019 and 2025, peaking in 2024 with 215 births. It ranked #249 for boys in 2025 on 187 births. Across those years it has been rising.

20200.03977
Births per 100,000 of that sex, so eras compare fairly. The shaded band is the 3-birth reporting floor — under it the registrar publishes nothing, so a line that stops has left the record, not fallen to zero. Kairo in England and Wales, 2019–2025

Seven years is a window, not a history. Unlike the American and New Zealand series this one cannot show you a name's arrival or its long decline — ONS publishes the full list only from 2019. England and Wales only: Scotland and Northern Ireland publish separately and are not counted here.

SOURCE·Office for National Statistics, baby names in England and Wales·Open Government Licence v3.0. ONS redacts any name given to 2 or fewer babies of that sex that year, under s40 of the Freedom of Information Act.·REVIEWED JUL 2026

Decade by decade in the US

US rank and births at each decade markSSA · JUL 2026
YearRankBirths
2000#4,06619
2010#4,09924
2020#2801,195

<5 = the SSA published no figure for that year. It is a suppressed value, not a zero.

Where in the United States

The states that registered Kairo most often since 1995. These are lifetime totals, so they track state population as much as local taste — a name common in Wyoming will never out-count California.

Questions about Kairo

How popular is the name Kairo?

Kairo ranked #226 for boys in the United States in 2025, on 1,577 births registered with the Social Security Administration.

When was Kairo most popular?

Kairo peaked in 2025, when 1,577 babies in the United States were given the name.

Is Kairo rising or falling?

Measured as a share of all boys' births, Kairo has been rising between 2016 and 2025 (+1045%).

Same sex, peaking within a few years of 2025, at a comparable scale. Not a taste engine — this is arithmetic on peak years, which is why it will occasionally hand you something unfashionable that is nonetheless exactly of the period.

SOURCE·US SSA (1880–2025) + NZ DIA (1900–2025) birth registrations·ranks and shares computed from the source files, see method·REVIEWED JUL 2026

See what every site in this family answers

Published by

Amit Sharma

Auckland real-estate agent and marketer. Builds free, sourced data tools.