Head to head · Girls' names
Katie vs Keira
#646 vs #621 in 2025 · both stepping back from its peak
Keira is a whisker ahead (#621 vs #646 in 2025) and both are stepping back from its peak. The records will not split these two — sound, story and your own last name will.
Cast your vote
Which one would you pick?
Your gut first, the numbers after — the split shows once you pick.
The tale of the tape
On the charts, Katie leads 3 measures of 6; Keira leads 2.
Ranks, counts and years are measured in the official US birth record; the classroom and living figures are estimates computed from it. The dot marks the side each measure favours on the charts — more common, not better.
What the records say
146 years of US births, drawn on one scale
Two curves, one scale
Who owned which decade
- 1880s: Katie #80, Keira — — Katie higher
- 1890s: Katie #97, Keira — — Katie higher
- 1900s: Katie #118, Keira — — Katie higher
- 1910s: Katie #170, Keira — — Katie higher
- 1920s: Katie #207, Keira — — Katie higher
- 1930s: Katie #235, Keira — — Katie higher
- 1940s: Katie #286, Keira — — Katie higher
- 1950s: Katie #380, Keira — — Katie higher
- 1960s: Katie #421, Keira #4199 — Katie higher
- 1970s: Katie #215, Keira #2432 — Katie higher
- 1980s: Katie #42, Keira #1916 — Katie higher
- 1990s: Katie #72, Keira #1288 — Katie higher
- 2000s: Katie #109, Keira #449 — Katie higher
- 2010s: Katie #305, Keira #257 — Keira higher
- 2020s: Katie #551, Keira #545 — Keira higher
Katie stood higher in 13 of 15 decades; Keira has held the lead since the 2010s.
Rank by decade
| Decade | Katie | Keira |
|---|---|---|
| 1880s | #80 | — |
| 1890s | #97 | — |
| 1900s | #118 | — |
| 1910s | #170 | — |
| 1920s | #207 | — |
| 1930s | #235 | — |
| 1940s | #286 | — |
| 1950s | #380 | — |
| 1960s | #421 | #4199 |
| 1970s | #215 | #2432 |
| 1980s | #42 | #1916 |
| 1990s | #72 | #1288 |
| 2000s | #109 | #449 |
| 2010s | #305 | #257 |
| 2020s | #551 | #545 |
Average national rank across each decade. A dash means the name sat outside the recorded top of that decade.
The names themselves
Meaning, roots, sound and the people who carried each
Where each name comes from
Katie
Traditionally read as "pure", through Katherine
Katie comes from Katherine, and Katherine from the Greek Aikaterine, whose own origin has never been settled. The familiar "pure" reading came later, when Greek and Latin Christians linked the name to katharos, "pure" — which is also why the spelling shifted toward Katharina. So "pure" is a genuine, centuries-old reading of the name, but it is an interpretation laid onto an older word nobody has decoded.
Aikaterine → Catharina → Katherine → Kate → Katie
How it traveled
The parent name, Aikaterine, is Greek and very old; it traveled west through Latin as Catharina and Katherina, and by the Middle Ages it had a form in nearly every European language. English speakers shortened it almost immediately and then kept shortening it — Katherine to Kate, Kate to Katie, with Kitty, Cathy and Kay along the way.
Keira
Dark, dark-haired
The root is the Irish adjective ciar, 'dark'. Keira is a phonetic English spelling of Ciara, the feminine of Ciarán. One caution: Keira is often filed alongside Kyra and Kira, which come from an unrelated Greek and Persian line meaning 'lord' or 'lady' — similar sound, different root.
ciar (Irish: dark) → Ciarán → Ciara → Kiera → Keira
How it traveled
The name begins with the Irish word ciar, 'dark', which gave the man's name Ciarán and its feminine counterpart Ciara. Ciara belonged to a seventh-century Irish saint, and the name stayed in Irish use for centuries before Irish naming came back into fashion across the English-speaking world in the twentieth century.
Where a reading is contested the note says so — this page does not turn a guess into a fact. The chain is each name's recorded forms, oldest first; the story is its opening, told in full on the name's own page.
Out loud, and in short
Katie
KAY-tee
One pronunciation everywhere in English, with the stress on the first syllable. Speakers rarely need it spelled out, though the choice between Katie and Katy does have to be stated.
- Kate — The older short form Katie itself grew out of; used both as a nickname and as a full given name.
- Kat — Informal, and the most common modern clipping; also used on its own.
- Kay — An older short form from the Katherine family, still in use among earlier generations.
- Kit — Informal and now uncommon, but a genuine part of the Katherine cluster.
- Also KT.
Keira
KEER-uh
Two syllables, stress on the first. The whole point of this spelling is that it produces KEER-uh on sight, where Ciara often does not.
- Kiki — The most common informal short form; used at home and among friends rather than on paper.
- Kei — A clipped one-syllable form, mostly spoken rather than written.
- Kay — Informal, and also a standalone given name of its own, more common among older generations.
One short form, two names
- Katie and Keira both shorten to Kay.
Short forms as recorded on each name’s own page. This is here so it is a decision rather than a discovery.
Is it right for you
The differences that decide it, laid out by what you want
Choose by what you want
Choose Katie if you want…
- a name fewer children share#646 in 2025 — katie will almost certainly be the only one in school
- a name past its most crowded yearsKatie is stepping back from its peak
- plenty of nickname options5 recorded short forms — Kate, Kat and Kay
- a long American recordKatie was already in use when US records began in 1880
Choose Keira if you want…
- a name most people already know#621 in 2025, 469 babies that year
- a newer arrivalKeira entered the US charts in 1962
- a name that ages quietlyan estimated 40% chance of feeling dated by 2040, against 77% for Katie
Each line is a measured difference between the two names — a rank, a count, a recorded form — never a judgement of either. Save the one that answers your question; it lands on your shortlist.
The trade-offs, name by name
Katie
Strengths
- Instantly readable and sayable by anyone who speaks English; no explaining, no phonetic detours.
- Has an unbroken record in American statistics stretching back to the earliest years of the data — never absent, never a novelty.
- Works as a full legal name or as the short form of Katherine, Kathryn, Katelyn and Kaitlyn, so a longer certificate name is optional, not required.
To consider
- Katie is strongly represented among adults now in their thirties and forties, so a baby Katie will likely share her name with colleagues of her parents before she shares it with classmates.
- Katie and Katy both look normal, so expect a lifetime of small corrections — and Kaytee, Katey and Cathy will each turn up in someone's address book.
- Because it began as a diminutive, some people will assume it is short for something and ask for the "real" name. Putting Katherine or Kathryn on the birth certificate is one way around it, though plenty of Katies have never needed to.
Keira
Strengths
- The spelling does the pronunciation work: most English speakers read Keira correctly the first time, which Ciara cannot always claim.
- Short, two syllables, no silent letters — easy to say, easy to write once learned.
- It carries a documented Irish root going back to an old adjective, ciar, and a saint's name from the seventh century.
To consider
- Keira, Kiera, Kira, Kyra and Ciara all sound close or identical, so expect a lifetime of spelling it out — and of receiving mail addressed to one of the others.
- One very well-known actress carries this spelling, and for many people the name will call her to mind first. That association is friendly, but it is strong.
- Births cluster in a fairly narrow stretch of years, so the name may read as belonging to a particular moment rather than as an old classic — though it is uncommon enough now that a child is unlikely to share it with a classmate.
Documented properties of each name — how it spells, travels and shortens — not opinions about the child.
How each is likely to age
Katie
77%chance Katie feels dated by 2040
Katie is coming down from a big peak (#38 in 1986). This is the stretch of the cycle where a name starts to sound like the decade it ruled.
Keira
40%chance Keira feels dated by 2040
Keira sits in the calm middle of the cycle — neither chasing a wave nor sliding off one. Middle-of-the-cycle names age slowly and predictably.
A reading of where each name sits on the long naming cycle — computed, not measured, and explained on the data page.
With your last name
Say both in full. The notes are facts about letters and sound — a rhyme, a shared initial, the monogram — not a verdict on either name.
Type a last name to hear Katie and Keira in full.
Weighing the whole shortlist? Run the full comparison — up to eight names with your last name, initials, classroom projections and a printable report.
Decide together
Nobody names a baby alone
Still torn between Katie and Keira?
Put both to the vote.
One link to your partner, your parents, your sister. Each of them gets the two names, a one-tap answer and room to say why — and every reply lands in one place.
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More than two in the running? Settle it with a bracket or run the full comparison with your last name.
More head-to-heads
Same measures, different pair. Sixty more are dealt daily in the arena.
Lists that carry both names
Every list here names both Katie and Keira — the same style, ranked by the same records.
Katie or Keira — the short answers
- Which is more popular, Katie or Keira?
- Keira, in 2025: Keira ranked #621 with 469 babies; Katie ranked #646 with 447 babies.
- Which name is rising faster, Katie or Keira?
- Neither is rising. Over the last five years Katie moved down 166 places; Keira moved down 154 places.
- Which is the older name, Katie or Keira?
- Katie was already in use when US records began in 1880; Keira entered the US charts in 1962. On the American record, Katie is the older name.
- How many people are named Katie and Keira?
- About 197,000 people named Katie are estimated to be alive in the US today. About 33,500 people named Keira are estimated to be alive in the US today.
- Do Katie and Keira share a nickname?
- Yes — both shorten to Kay, so in a house with both names the short form would not say which child is meant.
US figures from the Social Security Administration, 1880–2025. Votes are battle voters on this site, not the birth record. Data & methodology
Keep playing
Sixty more head-to-heads are dealt in the arena every day — or line up Katie, Keira and the rest of your shortlist with your last name in one printable report.
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