The baby name Lachlan appears in baby name data for the United States from 1997 to 2024. It was most popular in 2019 with 432 babies given the name.
In the later years of this period, Lachlan has become more popular compared with earlier years.
| Year | Count |
|---|---|
| 1997 | 6 |
| 1999 | 5 |
| 2000 | 7 |
| 2001 | 5 |
| 2004 | 6 |
| 2005 | 20 |
| 2006 | 97 |
| 2007 | 50 |
| 2008 | 94 |
| 2009 | 90 |
| 2010 | 100 |
| 2011 | 149 |
| 2012 | 135 |
| 2013 | 151 |
| 2014 | 224 |
| 2015 | 343 |
| 2016 | 381 |
| 2017 | 416 |
| 2018 | 386 |
| 2019 | 432 |
| 2020 | 349 |
| 2021 | 379 |
| 2022 | 299 |
| 2023 | 310 |
| 2024 | 410 |