Popularity in Northern Ireland
Numbers
| Niamh (feminine) | |||
| Year | Rank | Percent Used | |
| 2023 | #43 | 0.465 | |
| 2022 | #26 | 0.625 | |
| 2021 | #28 | 0.568 | |
| 2020 | #27 | 0.647 | |
| 2019 | #24 | 0.723 | |
| 2018 | #19 | 0.820 | |
| 2017 | #18 | 0.841 | |
| 2016 | #25 | 0.712 | |
| 2015 | #23 | 0.759 | |
| 2014 | #20 | 0.869 | |
| 2013 | #25 | 0.824 | |
| 2012 | #29 | 0.660 | |
| 2011 | #21 | 0.996 | |
| 2010 | #22 | 1.008 | |
| 2009 | #19 | 1.065 | |
| 2008 | #16 | 1.159 | |
| 2007 | #21 | 1.081 | |
| 2006 | #12 | 1.341 | |
| 2005 | #5 | 1.720 | |
| 2004 | #7 | 1.725 | |
| 2003 | #14 | 1.413 | |
| 2002 | #10 | 1.703 | |
| 2001 | #10 | 1.583 | |
| 2000 | #7 | 2.069 | |
| 1999 | #8 | 1.997 | |
| 1998 | #12 | 1.559 | |
| 1997 | #11 | 1.828 | |
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