Cidney
Cidney was last recorded in 2017, when 5 babies were given it; 892 Americans have been recorded with it between 1949 and 2017 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Cidney by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Cidney?
Unranked in 2025
Its last girls’ rank on record is #16,398, in 2017; SSA lists a name only in years with 5 or more births.
58 babies in 1999, the peak
Cidney peaked in 1999, when 58 girls were given it, #2,476 among girls’ names. It was not recorded in 2025.
Births by sex.
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2017 | 5 | #16,398 | 2.9 |
| 2016 | 7 | #13,206 | 4.0 |
| 2015 | 8 | #12,080 | 4.5 |
| 2014 | 13 | #8,579 | 7.3 |
| 2013 | 14 | #8,226 | 8.0 |
| 2012 | 15 | #7,905 | 8.5 |
| 2011 | 15 | #7,878 | 8.5 |
| 2010 | 17 | #7,285 | 9.6 |
| 2009 | 24 | #5,743 | 13.1 |
| 2008 | 26 | #5,468 | 13.7 |
Every recorded year (38)
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2007 | 27 | #5,266 | 14.0 |
| 2006 | 34 | #4,279 | 17.9 |
| 2005 | 38 | #3,814 | 20.6 |
| 2004 | 45 | #3,344 | 24.5 |
| 2003 | 40 | #3,540 | 21.9 |
| 2002 | 36 | #3,664 | 20.0 |
| 2001 | 33 | #3,877 | 18.3 |
| 2000 | 56 | #2,635 | 30.8 |
| 1999 | 58 | #2,476 | 32.7 |
| 1998 | 47 | #2,799 | 26.6 |
| 1997 | 45 | #2,737 | 25.9 |
| 1996 | 35 | #3,303 | 20.0 |
| 1995 | 49 | #2,557 | 27.9 |
| 1994 | 29 | #3,713 | 16.2 |
| 1993 | 19 | #5,026 | 10.5 |
| 1992 | 26 | #3,985 | 14.1 |
| 1991 | 20 | #4,834 | 10.7 |
| 1990 | 19 | #4,900 | 10.0 |
| 1989 | 11 | #7,057 | 6.0 |
| 1988 | 15 | #5,371 | 8.4 |
| 1987 | 6 | #10,080 | 3.5 |
| 1986 | 7 | #8,706 | 4.1 |
| 1985 | 8 | #7,711 | 4.6 |
| 1978 | 6 | #8,748 | 3.9 |
| 1975 | 5 | #9,333 | 3.4 |
| 1963 | 7 | #5,391 | 3.6 |
| 1953 | 5 | #5,796 | 2.7 |
| 1949 | 5 | #5,356 | 2.9 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Cidney a boy’s or a girl’s name?
Of the 892 Americans recorded as Cidney, 98% are girls and 2% boys.
Years with fewer than 20 babies given the name are left blank.
Girls and boys named Cidney: the SSA national file counts each sex separately.
How many people are named Cidney, and how old are they?
An estimated 874 Americans named Cidney and born in the U.S. are alive in 2026 (98% of everyone recorded); the median is 26 years old and half are between 21 and 31. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 995 people named Cidney (876 women and girls, 119 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 879 born in the U.S. The Census count is 13% above that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
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).
How common is the spelling Cidney?
Cidney is a less common spelling of Sydney: SSA has recorded 892 Cidney and 187,700 Sydney since 1880.
Of these 7 names spelled alike, given to 195,034 babies since 1880, Cidney is the fourth most given (<1% of them). In 2025 none of their 902 babies recorded by SSA was a Cidney (SSA lists a name only with 5 or more babies of one sex).
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 Cidney
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 Cidney and names like it
- Compare Cidney and SydneyBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1990sCidney peaked in 1999.
- Texas’s most given namesThe state where SSA recorded the most babies named Cidney since 1910.
- The top names of 1999The year the most babies were named Cidney.
- The names of Generation ZMost people named Cidney alive today were born 1997-2012.
- Names starting with CMost given first.