Willoughby is a rare name used for both girls and boys that peaked in 2021 and has grown less common since.
Willoughby is predominantly a boy name. It last appears in U.S. records in 2025. Willoughby was first reported in SSA data in 1915 and peaked in 1923 (15 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 5 | 5 | #17,134 | — |
| 2024 | 15 | 15 | #10,224 | #14,167 |
| 2023 | 7 | 7 | #13,385 | — |
| 2022 | 6 | 6 | #15,196 | — |
| 2021 | 17 | 17 | #10,254 | #10,735 |
| 2020 | 10 | 10 | #10,211 | — |
| 2019 | 5 | 5 | #17,855 | — |
| 2018 | 11 | 11 | #17,993 | #12,070 |
| 2017 | 7 | 7 | #14,033 | — |
| 2016 | 8 | 8 | #12,820 | — |
| 2015 | 6 | 6 | — | #12,024 |
| 2014 | 13 | 13 | #14,491 | #12,036 |
| 2013 | 8 | 8 | — | #9,618 |
| 2011 | 8 | 8 | — | #9,558 |
| 2010 | 6 | 6 | #16,888 | — |
| 2000 | 5 | 5 | #17,549 | — |
| 1958 | 6 | — | — | #3,935 |
| 1953 | 5 | — | — | #4,330 |
| 1945 | 5 | — | — | #3,771 |
| 1943 | 5 | — | — | #4,027 |
| 1941 | 7 | — | — | #3,129 |
| 1940 | 6 | — | — | #3,457 |
| 1935 | 5 | — | — | #4,140 |
| 1934 | 5 | — | — | #4,195 |
| 1933 | 5 | — | — | #4,141 |
| 1931 | 7 | — | — | #3,384 |
| 1930 | 7 | — | — | #3,588 |
| 1929 | 9 | — | — | #2,975 |
| 1928 | 8 | — | — | #3,354 |
| 1927 | 8 | — | — | #3,442 |
| 1926 | 7 | — | — | #3,700 |
| 1925 | 7 | — | — | #3,733 |
| 1923 | 15 | — | — | #2,221 |
| 1922 | 9 | — | — | #3,242 |
| 1921 | 5 | — | — | #4,967 |
| 1920 | 14 | — | — | #2,333 |
| 1919 | 6 | — | — | #4,157 |
| 1918 | 6 | — | — | #4,166 |
| 1917 | 9 | — | — | #2,952 |
| 1916 | 6 | — | — | #3,886 |
| 1915 | 5 | — | — | #4,383 |