Sidney
Girl name · #1872 in 2025 · Very rare
In 2025, 105 baby girls were named Sidney, placing it at #1872 in the official national rankings. A decade ago it stood at #997, so the name has been falling over the past ten years. Roughly one in every 17,143 girls born in 2025 was named Sidney.
The 145-year story
Sidney first appears in the Social Security records in 1880, when 16 girls received the name. Its peak came in 2000, when 1,221 girls were named Sidney — good for #265 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Babies named Sidney per year. Source: SSA.
Unlock the 5-year forecast and compare Sidney against up to 5 other names.
Uniqueness: will there be another Sidney in class?
On our rarity read — which blends how common Sidney is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Sidney will likely be the only one in the room, with the occasional spelling-out as the price.
Where Sidney is most common
State-level data for Sidney is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
Names like Sidney
Statistically, parents drawn to Sidney tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Macey, Carley, Vianey, Kailey, and Kayley.
MaceyCarleyVianeyKaileyKayleyChesneyKeeleyKarley
Rank history (last 25 years)
| Year | Babies named Sidney | Rank |
|---|---|---|
| 2025 | 105 | #1872 |
| 2024 | 117 | #1732 |
| 2023 | 128 | #1627 |
| 2022 | 165 | #1387 |
| 2021 | 164 | #1347 |
| 2020 | 141 | #1510 |
| 2019 | 179 | #1287 |
| 2018 | 215 | #1135 |
| 2017 | 225 | #1120 |
| 2016 | 260 | #1018 |
| 2015 | 270 | #997 |
| 2014 | 295 | #916 |
| 2013 | 282 | #906 |
| 2012 | 323 | #831 |
| 2011 | 413 | #680 |
| 2010 | 432 | #670 |
| 2009 | 571 | #529 |
| 2008 | 583 | #524 |
| 2007 | 668 | #486 |
| 2006 | 745 | #426 |
| 2005 | 834 | #378 |
| 2004 | 836 | #374 |
| 2003 | 951 | #330 |
| 2002 | 939 | #326 |
| 2001 | 1,053 | #296 |
Frequently asked questions
Is Sidney a popular girl name?
Sidney ranked #1872 among girls in 2025 with 105 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #997.
When was the name Sidney most popular?
Sidney peaked in 2000, when 1,221 American girls received the name (ranked #265 that year). Since 2000 the name has declined from that high.
How rare is the name Sidney?
In 2025, roughly 1 in 17,143 newborn American girls was named Sidney. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.