Cy
Cy was the 2540th most popular name for boys in 2025, given to 52 babies. Its best year was 1902, when it ranked 1037th; the most babies were born in 2010 (117). Over the last ten years it has moved down 325 places. More babies were named Cy in the 2000s than in any other decade.
Meaning Not yet researched how we research meanings
- Rank in 2025
- #2,540 boys, down 396 places since 2020
- Babies in 2025
- 52boys
- Girls and boys
- Almost always a boy’s name2021–2025
- Peak year
- 2010117 babies
- Total since 1880
- 3,921babies recorded
Cy popularity since 1880
A few girls are given the name too: 23 since 1999.
| Year | Rank (boys) | Babies (boys) |
|---|---|---|
| 2025 | #2,540 | 52 |
| 2020 | #2,144 | 65 |
| 2010 | #1,416 | 117 |
| 2000 | #1,504 | 80 |
| 1990 | #1,909 | 40 |
| 1980 | #1,576 | 38 |
| 1970 | #1,948 | 21 |
| 1960 | #1,699 | 23 |
| 1950 | #1,710 | 19 |
| 1940 | — | — |
| 1930 | #3,360 | 7 |
| 1920 | #4,445 | 5 |
| 1910 | — | — |
| 1900 | — | — |
| 1890 | — | — |
| 1880 | — | — |
How popular is Cy, counting every spelling?
Cy is a spelling of Sai, a name family that ranked #1,248 for boys in 2025 once every spelling is counted together, compared with #2,540 for Cy on its own. Together these spellings went to 147 boys in 2025.
| Spelling | Babies 2025 | Official rank | Babies 2021–2025 |
|---|---|---|---|
| Sai | 85 | #1,863 | 360 |
| Cy | 52 | #2,540 | 290 |
| Sy | 10 | #8,166 | 52 |
Spellings count together when they sound the same in American English and are used for the same sex; nicknames and forms that sound different (such as Theo and Theodore) are kept apart. How we group spellings.
How many kids will share the name Cy?
52 of the 3,606,400 babies born in the US in 2025 were named Cy (0.01 per 1,000 births). For a boy named Cy born in 2025, the chance that another child with the same name is in a class of 20 children the same age is under 1 in 50. If every grade liked the name as much as the 2025 babies do, only about one elementary school in 161 (of 430 pupils) would have a child named Cy.
Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.
How old are people named Cy?
About 3,400 people born in the US named Cy are alive today, with a median age of 22; half are between 14 and 39. That makes Cy mostly worn by children and young adults.
Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.
Cy by state
How common Cy was among boys born in each state in 2021–2025. It is notably more common than nationally in New York (1.8×). In 45 states fewer than five boys a year got the name, too few for SSA to publish, so those states show as zero.
Names with a similar history
These names rose and fell in step with Cy: their share of US boys followed the most similar curve since 1880. If you like Cy, they share its era and feel.
Cy is also a nickname for Cyrus.
Questions about the name Cy
How popular is the name Cy?
Cy was the 2540th most popular name for boys in 2025, given to 52 babies. Its best year was 1902, when it ranked 1037th; the most babies were born in 2010 (117). Over the last ten years it has moved down 325 places. More babies were named Cy in the 2000s than in any other decade.
Is Cy a boy or girl name?
In 2021–2025, almost always a boy’s name given the name Cy in the US.
Where is Cy most popular?
In 2021–2025, Cy was most common in New York (0.06 per 1,000 boys), followed by California and Texas.