Sinclair
Girl name · #4714 in 2025 · Very rare
How old is the name Sinclair? In official American birth records, Sinclair has been tracked continuously since 1989, giving it 36 years of documented American history.
In 2025, 29 baby girls were named Sinclair, placing it at #4714 in the official national rankings. A decade ago it stood at #6977, so the name has been rising over the past ten years. Roughly one in every 62,069 girls born in 2025 was named Sinclair.
Babies named Sinclair per year. Source: Official national birth records.
The 36-year story
Sinclair first appears in the Social Security records in 1989, when 5 girls received the name. Its all-time peak is essentially right now: 2025, with 29 babies and a rank of #4661. Names at their peak can keep climbing — or be one trend cycle from the long slide that eventually hits most popular names. 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.
Unlock the 5-year forecast and compare Sinclair against up to 5 other names.
Uniqueness: will there be another Sinclair in class?
On our rarity read — which blends how common Sinclair is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Sinclair will likely be the only one in the room, with the occasional spelling-out as the price.
Where Sinclair is most common
State-level data for Sinclair 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 Sinclair
Statistically, parents drawn to Sinclair tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Safiyyah, Shaindel, Sumayyah, Seraiah, and Sicilia.
SafiyyahShaindelSumayyahSeraiahSiciliaSafiyahSatoriMahnoor
Rank history (last 25 years)
| Year | Babies named Sinclair | Rank |
|---|---|---|
| 2025 | 29 | #4661 |
| 2024 | 28 | #4772 |
| 2023 | 22 | #5549 |
| 2022 | 13 | #8032 |
| 2021 | 18 | #6414 |
| 2020 | 9 | #10250 |
| 2019 | 12 | #8597 |
| 2018 | 17 | #6792 |
| 2017 | 16 | #7092 |
| 2016 | 9 | #10859 |
| 2015 | 17 | #6977 |
| 2014 | 8 | #11931 |
| 2013 | 10 | #10235 |
| 2012 | 12 | #9109 |
| 2011 | 14 | #8196 |
| 2010 | 5 | #16992 |
| 2009 | 8 | #12429 |
| 2008 | 11 | #10084 |
| 2007 | 8 | #12676 |
| 2006 | 15 | #7868 |
| 2005 | 12 | #8883 |
| 2004 | 9 | #10690 |
| 2003 | 11 | #9048 |
| 2002 | 13 | #7816 |
| 2001 | 15 | #6956 |
Frequently asked questions
How old is the name Sinclair?
In official American birth records, the name Sinclair first appeared in 1989 (over 36 years ago), when 5 newborn girls received the name. It has been tracked in modern national records for 36 years.
Is Sinclair a popular girl name?
Sinclair ranked #4714 among girls in 2025 with 29 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #6977.
When was the name Sinclair most popular?
Sinclair peaked in 2025, when 29 American girls received the name (ranked #4661 that year). That peak is current — the name is at or near its all-time high right now.
How rare is the name Sinclair?
In 2025, roughly 1 in 62,069 newborn American girls was named Sinclair. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
Data source: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.