Total births
635
Girls' name · since 1988
Sydnei
635 babies named Sydnei in U.S. Social Security records since 1988, with the highest year being 2005. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- 635
- total births
- 1988–2020
- years on record
- 2000s
- peak decade
- 43%
- born in that decade
635 girls have been named Sydnei since 1988, though it isn't currently a top-ranked name.
Sydnei has 635 recorded births among girls since 1988, per the U.S. Social Security Administration, though it falls outside today's most-used girls names, busiest in the 2000s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1988 to 2020.
- 635 total births
- 1988–2020 years on record
- 2000s peak decade
- 43% born in that decade
Data updated Jun 2026
The verdict
635 girls have been named Sydnei since 1988, peaking in the 2000s, last recorded in 2020.
- 635
- total births
- 1988–2020
- years on record
- 2000s
- peak decade
- 43%
- born in that decade
2000s
Peak decade
43% of everyone ever named Sydnei was born in this single decade.
2005
Single peak year
37 babies were named Sydnei in 2005 - its busiest year on record.
Sydnei's usage pattern, beyond the headline number
Divide Sydnei's SSA record in two at 2004 and the more recent half accounts for 49% of all births, the earlier half the remaining 51%, a genuinely balanced usage pattern. Its calmest year was 2019, with only 5 births recorded -- set against the 2005 peak of 37, that's the full swing in one name's fortunes.
Sydnei at a glance
Last recorded 2020Peak year
2005
Current rank
Unranked
Active since
1988
Sydnei popularity over time
Annual U.S. births registered with the Social Security Administration · 1988–2020
- Peak year (2005)
- 37
- Annual births at peak, across 33 years of records
Sydnei by decade
Total births in each ten-year window, peak vs trough at a glance
2000s was Sydnei's strongest decade.
274 babies received the name during that ten-year window, about 43% of all-time use.
Sydnei births by decade
Total births in each ten-year window
- 1980s 15
1980s
15 births
- 1990s
1990s
208 births
- 2000s
2000s
274 births
- 2010s
2010s
130 births
- 2020s 8
2020s
8 births
What this shows Peak: 2000s at 274 births (43% of all-time use).
How Sydnei compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 girls names closest to Sydnei's total volume
Sydnei vs 15 similarly-sized girls names
Sydnei by state
Where Sydnei concentrates geographically, total births since 1988
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Texas | | 21 | 3.3% |
| #2 | Georgia | | 20 | 3.1% |
| #3 | Louisiana | | 5 | 0.8% |
| #4 | Missouri | | 5 | 0.8% |
| #5 | Tennessee | | 5 | 0.8% |
Texas share of Sydnei's total US births 3.3%
Even split
21 of 635 births nationwide. Compared to a flat distribution across 5 reporting states.
Frequently Asked Questions
How popular is the name Sydnei? ▼
Sydnei has been given to 635 babies in the U.S. since 1988, according to SSA data. Its last appearance in the data was 2020. 37 babies were born in 2005, its single highest year.
When was Sydnei most popular? ▼
Sydnei was most popular in the 2000s decade with 274 total births. The single peak year was 2005.
Where is Sydnei most popular? ▼
The top states for the name Sydnei are Texas (21 births), Georgia (20 births), Louisiana (5 births).
How long has the name Sydnei been used? ▼
Records for Sydnei go back to 1988, giving 33 years of history through 2020.
What names are similar to Sydnei? ▼
Names with a similar sound or spelling include Sydney, Sydnee, Sydni, Sydnie, and 4 more. These share a common prefix and are also used for girls.
What to do with Sydnei's data
- Sydnei's decade-level peak was the 2000s (274 total births); usage has since declined to 8 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Texas records the most Sydneis (21 births) -- see the full state breakdown if geography matters to your decision. Texas names
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Sydnei
Nearby Names Like Sydnei
Names with a similar sound, spelling, or feel to Sydnei
Sydney Girl
#288 178,296 births
Sydnee Girl
#9048 8,255 births
Sydni Girl
#7323 5,361 births
Sydnie Girl
#8501 5,187 births
Sydne Girl
876 births
Compare Sydnei side by side: Sydnei vs Sydney Sydnei vs Sydnee Sydnei vs Sydni
Related Names
Names with a similar number of total births
Data Sources
Data as of June 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1988–2020 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Sydnei: Baby Name Since 1988 - 635 Births, Peak 2005." NameAlmanac. Accessed via https://namealmanac.com/name/sydnei. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Sydnei draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.