Rio
Masculine · “River (Spanish and Portuguese)”
Rio is given to both — 5,530 boys and 2,282 girls since 1880. See Rio as a girl nameSee other names given to both
Rio is the Spanish and Portuguese word for river, said the way it looks: two open syllables that end on a vowel. It travels easily — a place name on Brazilian maps, a word on Southwestern signposts, a given name in Japan written with a range of different characters. Duran Duran put it in the title of a 1982 album, and the sound has been familiar in English-speaking ears ever since.
How old is the name Rio?
Rio first appears in US birth records in 1920 — 105 years ago. The typical Rio is a kid of about 5 — this name's wave is very recent. About 5,400 people named Rio are estimated to be alive in the US today.
When was the name Rio most popular?
Rio peaked in 2024, reaching #517 nationally. Today it ranks #532, 15 places below that high. See the whole 2024 chart.
Where it comes from
From Latin rivus to Rio
The story of Rio
The Iberian route is straightforward: Latin rivus became río in Spanish and rio in Portuguese, and the word attached itself to places long before people — Rio Grande on the Mexican border, Rio de Janeiro named by Portuguese navigators in the sixteenth century for a bay they took for a river mouth. From place name to personal name is a short step, and one English has taken many times. Quite separately, Rio became established in Japan as a given name, spelled with various kanji combinations and used mainly for girls there. In US records the name has been present quietly for a very long time, with almost all of its momentum arriving recently.
Meaning
River (Spanish and Portuguese)
In Spanish and Portuguese, río/rio means river, from Latin rivus. Rio also arose separately in Japan as a given name, where the meaning depends entirely on which kanji a family chooses — so two children named Rio may not share a meaning at all.
How the name formed
- Latin rivus
- Spanish río / Portuguese rio
- Rioplace name
- Riogiven name
Related forms: Río · Rio · リオ · Rio
Pronouncing Rio
REE-oh
Two syllables, stress on the first. In Spanish the r is tapped and the accent mark appears (Río); in English it is usually said with a plain r and no accent.
Nicknames for Rio
Moderate
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1920
- Most boys named
- 2024593 — the highest on record
- Peak rank
- #517reached in 2024
- Change vs 2024
- −5.1%563 in 2025, from 593
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Rio in other languages
The same name elsewhere
- Río in Spanish — spelling variant
- Rio in Portuguese — same name
- リオ in Japanese — transliteration
- Rio in Italian — related form
Strongest US states over the last decade: California, Texas, Florida.
Rios among us
people named Rio are estimated to be alive in the US today
About 1 boy in 3,034 born in 2025 was named Rio
Estimated from SSA birth records and published actuarial life tables. Method
Is it right for you
What happens to a name after it peaks
The Rayford test
Every popular name lives one long story — a climb, a peak, a slow settling back. Rio's later chapters haven't been written yet, so we borrowed them: Rayford climbed just as high around 1937, and its whole arc is on record. Line the two peaks up, and Rayford's path sketches the road Rio is walking now.
Rio is climbing fast right now. Steep climbs tend to come with steep descents — the quicker a name arrives, the more firmly it belongs to its moment.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Where Rio is headed
Rio looks set to keep climbing gently, with roughly 45% more babies a year by 2030 if the current curve holds.
Medium confidence — fitted on official counts through 2025.
A damped-trend projection of the official birth data — a sketch of momentum, not a promise. Every name's forecast, ranked.
Rio beside its neighbors
The names ranked closest to Rio in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
The trade-off
- Spelled the way it sounds in English, Spanish and Portuguese — three letters, no silent parts, little room for a misspelling.
- Works as a complete name without needing a nickname, which suits families who dislike having their choice shortened for them.
- Recognized on several continents: a Spanish and Portuguese word, a Brazilian city, and an established given name in Japan.
- Strongest in California, Texas and Florida, where Spanish-language names are read fluently by neighbors and teachers.
- The city is the loudest association. Expect carnival, beaches and the occasional Rio de Janeiro joke — mild, but lifelong.
- The spelling reaches boys and girls by two roads: through the Spanish and Portuguese word in the Americas, and through Japanese given names, where it is used mostly for girls. In the US it leans male, but the assumption is not universal.
- Most people carrying it in the US are still small children, so a Rio will rarely meet an adult with the same name — and will almost certainly be the only one in a classroom.
- Watch for drift toward Ryo or Rios in writing, since both are familiar to different sets of people.
Nobody names a baby alone.
Put Rio to the vote.
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What they receive
Someone added a name to your list
Rio
Masculine · #532 in the U.S.
Frequently asked
- How many Rios are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 5,400 people named Rio are estimated to be alive in the US today.
- How popular is the name Rio in 2025?
- Rio ranks #532 among US boy names in 2025, with 563 babies given the name.
- How rare is the name Rio?
- About 1 in every 3,034 US boys born in 2025 was named Rio — 563 in all.
- Will my child share the name Rio with classmates?
- Rio will almost certainly be the only one in school.
Ranked beside Rio
Names sitting at a similar level of popularity right now.
Troy#532 · Tyson#531 · Scott#534 · Ridge#529 · Kendrick#535 · Azriel#529 · Zachariah#536 · Eiden#536
Looking for what else is popular rather than what resembles Rio? See the current top 100.
Choosing between Rio and another name?
See them side by side — full stats, history and a gentle verdict.
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Which one would you pick?
Your gut first, the numbers after — the split shows once you pick.
US figures from the Social Security Administration. 1880–2025. Data & methodology
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