Head to head · Girls' names
Katie vs Thalia
#646 vs #647 in 2025
Katie is a whisker ahead (#646 vs #647 in 2025), but the curves point different ways: Katie is stepping back from its peak, Thalia is back after a long quiet spell. On momentum, Thalia has the edge.
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 5 measures of 6; Thalia leads 1.
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, Thalia #1047 — Katie higher
- 1890s: Katie #97, Thalia #1394 — Katie higher
- 1900s: Katie #118, Thalia #1530 — Katie higher
- 1910s: Katie #170, Thalia #1566 — Katie higher
- 1920s: Katie #207, Thalia #1501 — Katie higher
- 1930s: Katie #235, Thalia #1466 — Katie higher
- 1940s: Katie #286, Thalia #1742 — Katie higher
- 1950s: Katie #380, Thalia #1941 — Katie higher
- 1960s: Katie #421, Thalia #1767 — Katie higher
- 1970s: Katie #215, Thalia #2263 — Katie higher
- 1980s: Katie #42, Thalia #2484 — Katie higher
- 1990s: Katie #72, Thalia #679 — Katie higher
- 2000s: Katie #109, Thalia #719 — Katie higher
- 2010s: Katie #305, Thalia #842 — Katie higher
- 2020s: Katie #551, Thalia #672 — Katie higher
Katie stood higher in every recorded decade — 15 of 15.
Rank by decade
| Decade | Katie | Thalia |
|---|---|---|
| 1880s | #80 | #1047 |
| 1890s | #97 | #1394 |
| 1900s | #118 | #1530 |
| 1910s | #170 | #1566 |
| 1920s | #207 | #1501 |
| 1930s | #235 | #1466 |
| 1940s | #286 | #1742 |
| 1950s | #380 | #1941 |
| 1960s | #421 | #1767 |
| 1970s | #215 | #2263 |
| 1980s | #42 | #2484 |
| 1990s | #72 | #679 |
| 2000s | #109 | #719 |
| 2010s | #305 | #842 |
| 2020s | #551 | #672 |
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.
Thalia
blooming, flourishing
From Greek thallein, 'to bloom' or 'to flourish' — the same root behind the name Thallo, one of the Greek seasons-goddesses.
Thaleia → Thalia → Talía
How it traveled
In Greek myth the name belongs to two figures at once: Thaleia, the Muse of comedy and idyllic poetry, and Thaleia, one of the three Charites or Graces. Both readings turn on the same idea of flourishing, and both kept the name alive through Roman writers, who spelled it Thalia in Latin.
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.
Thalia
THAH-lee-uh
Three pronunciations are all in real use in the US: THAH-lee-uh, thuh-LEE-uh, and the Spanish-style tah-LEE-ah. None is wrong, so expect to state your preference more than once.
- Lia — The most portable short form, and a standalone given name in its own right in several languages.
- Tali — Informal, drawn from the Spanish-influenced pronunciation; also used independently as a Hebrew name.
- Thali — Informal, keeps the original spelling; common within families rather than at school.
- Tally — Playful English-style shortening, spelled to match the sound.
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 past its most crowded yearsKatie is stepping back from its peak
- a long American recordKatie was already in use when US records began in 1880
- a name that feels very nowKatie is stepping back from its peak
Choose Thalia if you want…
- a name on the way upup 155 places on the charts in five years
- a newer arrivalThalia entered the US charts in 1885
- a name that ages quietlyan estimated 30% 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.
Thalia
Strengths
- Meaning is documented and uncontested: 'blooming', from a Greek verb.
- Works in English and Spanish with only an accent's difference — Thalia and Talía are the same name.
- A written record stretching from Greek myth through Latin literature to modern birth registers.
To consider
- The pronunciation genuinely varies — THAH-lee-uh, thuh-LEE-uh and tah-LEE-ah all exist. A Thalia will spend her life gently correcting people, or deciding not to.
- The 'th' is often dropped in writing: expect Talia and Tahlia as recurring misspellings, and some confusion with Dahlia and with Talia as a short form of Natalia.
- It is on the way back up rather than settled, which means she may meet more Thalias among younger children than among her own age group.
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.
Thalia
30%chance Thalia feels dated by 2040
Thalia is on its second act. Revived names age gently: the generation that wore them first is far enough away that the name feels classic rather than dated.
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 Thalia 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 Thalia?
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.
Free to start · no account needed · everyone you invite votes in one tap
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 Thalia — the same style, ranked by the same records.
Katie or Thalia — the short answers
- Which is more popular, Katie or Thalia?
- Katie, in 2025: Katie ranked #646 with 447 babies; Thalia ranked #647 with 446 babies.
- Which name is rising faster, Katie or Thalia?
- Thalia. Over the last five years Katie moved down 166 places; Thalia moved up 155 places.
- Which is the older name, Katie or Thalia?
- Katie was already in use when US records began in 1880; Thalia entered the US charts in 1885. On the American record, Katie is the older name.
- How many people are named Katie and Thalia?
- About 197,000 people named Katie are estimated to be alive in the US today. About 15,000 people named Thalia are estimated to be alive in the US today.
- Will there be other Katies or Thalias in the classroom?
- Katie will almost certainly be the only one in school. Thalia will almost certainly be the only one in school.
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, Thalia and the rest of your shortlist with your last name in one printable report.
Free to start · no account needed · everyone you invite votes in one tap