Head to head · Girls' names
Siena vs Sierra
#610 vs #614 in 2025
Siena is a whisker ahead (#610 vs #614 in 2025), but the curves point different ways: Siena is holding its place on the charts, Sierra is stepping back from its peak.
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
The tape is even: Siena and Sierra each lead 3 measures of 6.
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
- 1940s: Siena —, Sierra #2616 — Sierra higher
- 1950s: Siena —, Sierra #4920 — Sierra higher
- 1960s: Siena #6539, Sierra #4893 — Sierra higher
- 1970s: Siena #8423, Sierra #1769 — Sierra higher
- 1980s: Siena #7257, Sierra #487 — Sierra higher
- 1990s: Siena #2536, Sierra #85 — Sierra higher
- 2000s: Siena #992, Sierra #112 — Sierra higher
- 2010s: Siena #638, Sierra #369 — Sierra higher
- 2020s: Siena #646, Sierra #561 — Sierra higher
Sierra stood higher in every recorded decade — 9 of 9.
Rank by decade
| Decade | Siena | Sierra |
|---|---|---|
| 1940s | — | #2616 |
| 1950s | — | #4920 |
| 1960s | #6539 | #4893 |
| 1970s | #8423 | #1769 |
| 1980s | #7257 | #487 |
| 1990s | #2536 | #85 |
| 2000s | #992 | #112 |
| 2010s | #638 | #369 |
| 2020s | #646 | #561 |
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
Siena
from Siena, the city in Tuscany
What the city's own name means is a separate and unsettled question: it has been linked to the Etruscan family name Saina and to the Roman colony called Saena Julia, and neither reading has won. The English word sienna for the reddish-brown pigment comes from terra di Siena, earth of Siena.
Saena Julia → Siena → Sienna
How it traveled
Siena is the Italian spelling of the Tuscan city, a Roman settlement that grew into one of medieval Europe's great banking and painting centers and still runs its Palio horse race around the shell-shaped Piazza del Campo. Its clay-rich earth was dug, ground and sold to painters across Europe, which is how the city's name entered English as a color rather than as a name for a person.
Sierra
mountain range; literally 'saw'
Spanish sierra comes from Latin serra, 'saw' — the word was applied to ridgelines that look toothed against the horizon.
serra (Latin, 'saw') → sierra (Spanish, 'mountain range') → Sierra
How it traveled
The word is Latin serra, a saw, which Spanish turned into sierra and used for jagged mountain chains. Spanish speakers carried it across the Atlantic and left it on the map of the Americas — the Sierra Madre, the Sierra Nevada of California, and dozens of smaller ranges besides.
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
Siena
see-EN-uh
In Italian the first syllable glides into one sound, closer to SYEH-nah. In American English the three-syllable see-EN-uh is standard; some readers try SEE-nuh on first sight, which usually needs one gentle correction.
- Sia — The most natural short form; also used on its own as a given name and as a stage name, so it reads as a full name to many people.
- Sisi — Affectionate, family-and-close-friends register rather than anything you would write on a form.
- Si — Very informal and clipped; shared with Simon and Sian, so it rarely stands alone.
Sierra
see-AIR-uh
In Spanish the r is trilled: SYEH-rrah. Both are correct for the same name; English speakers almost never need it spelled out.
- Si — Informal, family-level shortening; rarely written down.
- Sia — Informal short form, and a given name in its own right in several languages.
- Sierrita — Spanish-style diminutive, used affectionately in Spanish-speaking households.
One short form, two names
- Siena and Sierra both shorten to Sia.
- Siena and Sierra both shorten to Si.
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 Siena if you want…
- a name on the way upup 28 places on the charts in five years
- a name with fewer syllablesSiena is 2 syllables to Sierra's 3
- a name that ages quietlyan estimated 40% chance of feeling dated by 2040, against 75% for Sierra
Choose Sierra if you want…
- a name past its most crowded yearsSierra is stepping back from its peak
- a name with more sound in itSierra runs 3 syllables, Siena 2
- a name that feels very nowSierra is stepping back from its peak
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
Siena
Strengths
- Already familiar in English as a color word, so most people can spell some version of it after hearing it once.
- Pronounced almost identically in Italian, Spanish and English — it crosses borders without being reshaped.
- Ties to a real, well-documented place with a thousand years of history behind it, rather than to a coined spelling.
To consider
- Sienna, with two n's, is the more common English spelling. Expect a lifetime of small corrections, and choose knowing that written forms will often come back doubled.
- The Toyota Sienna has been on American roads for decades. It is a mild, passing association rather than a real problem, but it exists.
- The name's use is genuinely recent, so there are few adult or elderly bearers to point to. A child named Siena will likely be the one who defines it for the people around her.
Sierra
Strengths
- The spelling is already fixed in English by maps, parks and place names, so it is read and written correctly with little explanation.
- Fully at home in both English and Spanish, with no change of spelling — useful in bilingual families.
- It is also the NATO alphabet word for the letter S, which makes it unusually easy to say clearly over a phone.
To consider
- It is a word before it is a name, and a well-branded one: the Sierra Club, Sierra Nevada beer, a GMC truck. Most people hear the name first, but the associations are there.
- Because so many bearers are now grown, it can read as a name belonging to a particular cohort of adults rather than to babies — that fades as the cycle turns, but it is true at the moment.
- It resists shortening. Sierra tends to stay Sierra, which suits some families and frustrates others who like having a nickname in reserve.
Documented properties of each name — how it spells, travels and shortens — not opinions about the child.
How each is likely to age
Siena
40%chance Siena feels dated by 2040
Siena 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.
Sierra
75%chance Sierra feels dated by 2040
Sierra is coming down from a big peak (#49 in 1999). This is the stretch of the cycle where a name starts to sound like the decade it ruled.
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 Siena and Sierra 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 Siena and Sierra?
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 Siena and Sierra — the same style, ranked by the same records.
Siena or Sierra — the short answers
- Which is more popular, Siena or Sierra?
- Siena, in 2025: Siena ranked #610 with 479 babies; Sierra ranked #614 with 476 babies.
- Which name is rising faster, Siena or Sierra?
- Siena. Over the last five years Siena moved up 28 places; Sierra moved down 83 places.
- Which is the older name, Siena or Sierra?
- Siena entered the US charts in 1965; Sierra entered the US charts in 1940. On the American record, Sierra is the older name.
- How many people are named Siena and Sierra?
- About 11,000 people named Siena are estimated to be alive in the US today. About 99,000 people named Sierra are estimated to be alive in the US today.
- Do Siena and Sierra share a nickname?
- Yes — both shorten to Sia and Si, 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 Siena, Sierra and the rest of your shortlist with your last name in one printable report.
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