The baby name Declan appears in baby name data for the United States from 1968 to 2024. It was most popular in 2019 with 5,152 babies given the name.
In the later years of this period, Declan has become more popular compared with earlier years.
| Year | Count |
|---|---|
| 1968 | 5 |
| 1985 | 5 |
| 1988 | 5 |
| 1989 | 7 |
| 1990 | 13 |
| 1991 | 6 |
| 1992 | 32 |
| 1993 | 10 |
| 1994 | 14 |
| 1995 | 53 |
| 1996 | 53 |
| 1997 | 85 |
| 1998 | 174 |
| 1999 | 356 |
| 2000 | 337 |
| 2001 | 604 |
| 2002 | 596 |
| 2003 | 653 |
| 2004 | 614 |
| 2005 | 906 |
| 2006 | 896 |
| 2007 | 957 |
| 2008 | 1,014 |
| 2009 | 1,146 |
| 2010 | 1,371 |
| 2011 | 2,410 |
| 2012 | 3,233 |
| 2013 | 3,648 |
| 2014 | 3,876 |
| 2015 | 4,466 |
| 2016 | 4,682 |
| 2017 | 6 |
| 2017 | 4,472 |
| 2018 | 5,011 |
| 2019 | 5,152 |
| 2020 | 4,054 |
| 2021 | 6 |
| 2021 | 4,345 |
| 2022 | 3,873 |
| 2023 | 3,175 |
| 2024 | 3,111 |