The baby name Sydni appears in baby name data for the United States from 1987 to 2017. It was most popular in 2001 with 498 babies given the name.
In the later years of this period, Sydni has become less common than it once was.
| Year | Count |
|---|---|
| 1987 | 12 |
| 1988 | 12 |
| 1990 | 46 |
| 1991 | 37 |
| 1992 | 62 |
| 1993 | 48 |
| 1994 | 122 |
| 1995 | 201 |
| 1996 | 256 |
| 1997 | 251 |
| 1998 | 233 |
| 1999 | 375 |
| 2000 | 495 |
| 2001 | 498 |
| 2002 | 278 |
| 2003 | 324 |
| 2004 | 283 |
| 2005 | 233 |
| 2006 | 172 |
| 2007 | 101 |
| 2008 | 133 |
| 2009 | 68 |
| 2010 | 30 |
| 2011 | 26 |
| 2012 | 18 |
| 2013 | 15 |
| 2014 | 23 |
| 2015 | 10 |
| 2016 | 6 |
| 2017 | 6 |