Harlo is a rare variant of Harlow that has climbed to its highest level yet, peaking in 2023.
Harlo is predominantly a girl name. In 2025 it ranked #3,538 among girls (43) and #3,793 among boys (29) — overall #4,403 across all names. The charts below show girls and boys separately.
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 72 | 72 | #3,538 | #3,793 |
| 2024 | 61 | 61 | #5,064 | #3,353 |
| 2023 | 78 | 78 | #3,398 | #3,656 |
| 2022 | 48 | 48 | #4,959 | #4,764 |
| 2021 | 55 | 55 | #4,051 | #4,990 |
| 2020 | 38 | 38 | #4,391 | #9,930 |
| 2019 | 38 | 38 | #3,873 | — |
| 2018 | 21 | 21 | #5,862 | — |
| 2017 | 22 | 22 | #5,727 | — |
| 2016 | 23 | 23 | #6,746 | #12,906 |
| 2015 | 25 | 25 | #6,829 | #9,929 |
| 2014 | 28 | 28 | #6,075 | #10,021 |
| 2013 | 18 | 18 | #9,231 | #11,226 |
| 2012 | 22 | 22 | #7,586 | #11,294 |
| 2011 | 29 | 29 | #5,807 | #11,343 |
| 2010 | 21 | 21 | #6,259 | — |
| 2009 | 22 | 22 | #7,464 | #13,155 |
| 2008 | 10 | 10 | #11,090 | — |
| 1950 | 5 | — | — | #3,897 |
| 1949 | 6 | — | — | #3,480 |
| 1946 | 5 | — | — | #3,727 |
| 1945 | 5 | — | — | #3,504 |
| 1938 | 10 | — | — | #2,388 |
| 1937 | 7 | — | — | #3,023 |
| 1935 | 8 | — | — | #2,805 |
| 1933 | 8 | — | — | #2,844 |
| 1929 | 5 | — | — | #4,228 |
| 1928 | 8 | — | — | #3,205 |
| 1927 | 6 | — | — | #3,946 |
| 1926 | 5 | — | — | #4,476 |
| 1925 | 8 | — | — | #3,253 |
| 1923 | 7 | — | — | #3,620 |
| 1920 | 8 | — | — | #3,334 |
| 1919 | 8 | — | — | #3,227 |
| 1918 | 6 | — | — | #3,914 |
| 1916 | 7 | — | — | #3,317 |