Dillen is a rare variant of Dillon that peaked in 2003 and has since faded.
Dillen is predominantly a boy name. It last appears in U.S. records in 2023. Dillen was first reported in SSA data in 1991 and peaked in 2003 (40 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2023 | 5 | 5 | — | #12,694 |
| 2021 | 5 | 5 | — | #12,622 |
| 2019 | 5 | 5 | — | #12,647 |
| 2018 | 7 | 7 | — | #9,940 |
| 2017 | 6 | 6 | — | #11,115 |
| 2016 | 12 | 12 | — | #6,828 |
| 2015 | 6 | 6 | — | #11,026 |
| 2014 | 13 | 13 | — | #6,387 |
| 2013 | 14 | 14 | — | #5,995 |
| 2012 | 17 | 17 | — | #5,306 |
| 2011 | 16 | 16 | — | #5,489 |
| 2010 | 17 | 17 | — | #5,307 |
| 2009 | 27 | 27 | — | #3,850 |
| 2008 | 21 | 21 | — | #4,580 |
| 2007 | 34 | 34 | #18,397 | #3,625 |
| 2006 | 39 | 39 | #15,659 | #3,241 |
| 2005 | 37 | 37 | #12,143 | #3,402 |
| 2004 | 47 | 47 | #11,917 | #2,710 |
| 2003 | 59 | 59 | #6,135 | #2,557 |
| 2002 | 28 | 28 | #16,147 | #3,698 |
| 2001 | 32 | 32 | — | #2,882 |
| 2000 | 38 | 38 | #15,736 | #2,755 |
| 1999 | 29 | 29 | — | #2,887 |
| 1998 | 29 | 29 | — | #2,802 |
| 1997 | 22 | — | — | #3,279 |
| 1996 | 33 | — | — | #2,396 |
| 1995 | 28 | — | — | #2,637 |
| 1994 | 35 | — | — | #2,269 |
| 1993 | 26 | — | — | #2,730 |
| 1992 | 38 | — | — | #2,055 |
| 1991 | 22 | — | — | #2,931 |