Kieren is a rare variant of Kieran that peaked in 2010 and has grown less common since.
Kieren is predominantly a boy name. In 2025 it ranked #5,736 for boy births in the United States (and #12,088 across all names), given to 16 babies. Kieren was first reported in SSA data in 1990 and peaked in 2011 (28 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 16 | 16 | — | #5,736 |
| 2024 | 15 | 15 | — | #6,047 |
| 2023 | 12 | 12 | — | #7,116 |
| 2022 | 7 | 7 | — | #10,377 |
| 2021 | 13 | 13 | — | #6,526 |
| 2020 | 10 | 10 | — | #7,825 |
| 2019 | 14 | 14 | — | #6,273 |
| 2018 | 17 | 17 | — | #5,434 |
| 2017 | 17 | 17 | — | #5,421 |
| 2016 | 14 | 14 | — | #6,202 |
| 2015 | 14 | 14 | — | #6,163 |
| 2014 | 32 | 32 | #15,649 | #3,967 |
| 2013 | 22 | 22 | — | #4,401 |
| 2012 | 21 | 21 | — | #4,615 |
| 2011 | 28 | 28 | — | #3,739 |
| 2010 | 36 | 36 | #8,515 | #4,451 |
| 2009 | 27 | 27 | #16,287 | #4,674 |
| 2008 | 35 | 35 | #9,261 | #4,476 |
| 2007 | 17 | 17 | #14,735 | #7,916 |
| 2006 | 24 | 24 | #10,275 | #6,303 |
| 2005 | 16 | 16 | #15,510 | #7,428 |
| 2004 | 18 | 18 | #15,157 | #6,356 |
| 2003 | 27 | 27 | — | #3,412 |
| 2002 | 23 | 23 | #9,906 | #5,580 |
| 2001 | 28 | 28 | #9,074 | #4,594 |
| 2000 | 25 | 25 | #14,107 | #4,147 |
| 1999 | 22 | 22 | #15,690 | #4,253 |
| 1998 | 14 | 14 | — | #4,778 |
| 1997 | 8 | — | — | #6,978 |
| 1996 | 15 | — | #12,677 | #6,288 |
| 1995 | 10 | — | — | #5,729 |
| 1993 | 17 | — | #12,632 | #5,206 |
| 1992 | 11 | — | — | #5,090 |
| 1990 | 11 | — | #14,099 | #7,674 |