Sian Boy & girl
How popular is Sian?
#4,049 boy name in 2025
26 baby boys were named Sian in the US in 2025, making it the 4049th most popular boy name. Another 5 girls got the name (#14,938 for girls).
Sian popularity over time
Boys Girls
| Rank in 2025 | #4,049 for boys (▲ 4258 from 2024) |
|---|---|
| Babies in 2025 | 26 boys, 5 girls |
| 10-year trend | New in the last 10 years |
| Earlier ranks | #6,616 in 2020 |
| Peak year | 2025 (26 boys) |
| Highest rank | #4,049 in 2025 |
| First recorded | 1995 |
| Boys vs girls (last 10 years) | 55% boys, 45% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Sian counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Sione family of names ranked #1,194 for boys in 2025 (#1,401 the year before), with 139 babies in all.
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Sian is most popular
Babies named Sian per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
- Florida: 0.0 per 1,000 (5 boys)
Sian by decade
Boy names about as popular as Sian
Questions
- Is Sian a boy or girl name?
- Sian is used for both. Over the last 10 years, 55% of babies named Sian were boys and 45% were girls.
- How popular is the name Sian?
- 26 baby boys were named Sian in the US in 2025, making it the 4049th most popular boy name. Another 5 girls got the name (#14,938 for girls).
- When was Sian most popular?
- Sian peaked in 2025, when 26 boys were given the name. Its highest rank was #4,049 in 2025.
- How many people are named Sian?
- 1,030 babies have been named Sian in the US since 1880. We estimate about 1,008 of them are alive in 2026, with a median age of 24.
- Where is Sian most popular?
- From 2021 to 2025, Sian was most common in Florida, at 0.0 of every 1,000 boys born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.