Sydni
Sydni was given to 8 girls in 2025, #11,812 among girls’ names; 5,361 Americans have been recorded with it since 1947 (Social Security Administration, published May 2026).
An estimated 5,280 Americans named Sydni and born in the U.S. are alive in 2026 (99% of everyone recorded); the median is 25 years old and half are between 21 and 29.
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Sydni by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Sydni?
#11,812 among girls’ names, 2025
Sydni fell from #3,694 in 2015 to #11,812 in 2025 among girls’ names; its share of girls born fell from 23.5 to 5.0 per million.
468 babies in 2000, the peak
Sydni peaked in 2000, when 468 girls were given it, #559 among girls’ names. The 8 births of 2025 are 2% of that peak.
| Year | Births | Rank | Per 1,000 girls |
|---|---|---|---|
| 2025 | 8 | #11,812 | under 0.01 |
| 2024 | 15 | #7,553 | 0.01 |
| 2023 | 5 | #17,341 | under 0.01 |
| 2022 | 16 | #7,246 | 0.01 |
| 2021 | 16 | #7,219 | 0.01 |
| 2020 | 28 | #4,743 | 0.02 |
| 2019 | 31 | #4,530 | 0.02 |
| 2018 | 33 | #4,344 | 0.02 |
| 2017 | 45 | #3,473 | 0.03 |
| 2016 | 40 | #3,845 | 0.02 |
Every recorded year (49)
| Year | Births | Rank | Per 1,000 girls |
|---|---|---|---|
| 2015 | 42 | #3,694 | 0.02 |
| 2014 | 71 | #2,531 | 0.04 |
| 2013 | 53 | #3,118 | 0.03 |
| 2012 | 71 | #2,563 | 0.04 |
| 2011 | 85 | #2,236 | 0.05 |
| 2010 | 104 | #1,937 | 0.06 |
| 2009 | 109 | #1,931 | 0.06 |
| 2008 | 130 | #1,715 | 0.07 |
| 2007 | 129 | #1,702 | 0.07 |
| 2006 | 176 | #1,330 | 0.09 |
| 2005 | 200 | #1,161 | 0.11 |
| 2004 | 247 | #971 | 0.13 |
| 2003 | 314 | #787 | 0.17 |
| 2002 | 331 | #738 | 0.18 |
| 2001 | 399 | #630 | 0.22 |
| 2000 | 468 | #559 | 0.26 |
| 1999 | 397 | #611 | 0.22 |
| 1998 | 240 | #883 | 0.14 |
| 1997 | 253 | #818 | 0.15 |
| 1996 | 235 | #850 | 0.13 |
| 1995 | 242 | #814 | 0.14 |
| 1994 | 162 | #1,111 | 0.09 |
| 1993 | 119 | #1,382 | 0.07 |
| 1992 | 116 | #1,412 | 0.06 |
| 1991 | 93 | #1,620 | 0.05 |
| 1990 | 89 | #1,664 | 0.05 |
| 1989 | 63 | #2,017 | 0.03 |
| 1988 | 43 | #2,527 | 0.02 |
| 1987 | 40 | #2,565 | 0.02 |
| 1986 | 19 | #4,329 | 0.01 |
| 1985 | 19 | #4,266 | 0.01 |
| 1984 | 11 | #6,236 | 0.01 |
| 1983 | 13 | #5,414 | 0.01 |
| 1982 | 9 | #7,393 | 0.01 |
| 1975 | 6 | #8,903 | under 0.01 |
| 1971 | 7 | #7,269 | under 0.01 |
| 1970 | 5 | #9,157 | under 0.01 |
| 1966 | 9 | #4,814 | 0.01 |
| 1947 | 5 | #6,028 | under 0.01 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Sydni a boy’s or a girl’s name?
Sydni has been recorded only for girls: SSA lists no boys with the name in 49 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Sydni: the SSA national file counts each sex separately.
How many people are named Sydni, and how old are they?
5,280 alive in 2026, estimated
That is 99% of the 5,361 Americans ever recorded as Sydni. The median Sydni alive today is 25 years old; half are between 21 and 29.
The 2020 Census counted 4,895 people named Sydni (4,871 women and girls, 24 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 5,221 born in the U.S. The Census count is 6% below that prediction.
Alive today, by age
Alive today, by generation
| Generation | Born | Alive |
|---|---|---|
| Baby Boomers | 1946-1964 | 3 |
| Generation X | 1965-1980 | 25 |
| Millennials | 1981-1996 | 1,250 |
| Generation Z | 1997-2012 | 3,610 |
| Generation Alpha | 2013-2025 | 400 |
An estimate, not a count. SSA’s files count people born in the United States who received a Social Security number, so anyone born abroad is not in them; before 1937 most people got a number as adults, and their survival is counted from that age.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Where are babies named Sydni born?
The states with the most babies named Sydni are Texas, California and Louisiana, with 29% of its births recorded by state since 1910; Louisiana is not among the ten states with the most births.
| State | Since 1910 | Rank, girls | vs. national |
|---|---|---|---|
| Texas | 495 | not ranked | 1.0× |
| California | 304 | not ranked | 0.4× |
| Louisiana | 225 | not ranked | 2.5× |
| Georgia | 224 | not ranked | 1.3× |
| Florida | 207 | not ranked | 0.8× |
| Illinois | 205 | not ranked | 0.8× |
| Michigan | 202 | not ranked | 1.1× |
| Ohio | 187 | not ranked | 0.8× |
| Missouri | 148 | not ranked | 1.3× |
| North Carolina | 130 | not ranked | 0.8× |
Where Sydni is more common than its national share predicts
Relative to its national share, Sydni is most over-represented in Louisiana: since 1947 it was given 2.5 times as often there as its national share each year would predict.
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among girls’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Sydni with the births its national share predicts year by year, for states with at least 100 births of the name.
How common is the spelling Sydni?
Sydni is a less common spelling of Sydney: SSA has recorded 5,361 Sydni and 187,700 Sydney since 1880.
Of these 8 names spelled alike, given to 208,596 babies since 1880, Sydni is the third most given (2.6% of them). In 2025 it was given to 8 of their 924 babies (<1%), the fourth most given that year.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Sydni
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Sydni and names like it
- Compare Sydni and SydneyBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2000sSydni peaked in 2000.
- Texas’s most given namesThe state where SSA recorded the most babies named Sydni since 1910.
- The top names of 2000The year the most babies were named Sydni.
- The names of Generation ZMost people named Sydni alive today were born 1997-2012.
- Names starting with SMost given first.