Louisa vs Lou
Side-by-side comparison of Louisa and Lou - popularity rank, total births, peak decade, and historical trends from Social Security Administration data.
Which name is more popular?
| Metric | Louisa | Lou |
| Current Rank | #732 | #2508 |
| Total Births (all years) | 21,932 | 34,109 |
| Peak Year | 2021 | 1954 |
| Peak Year Births | 424 | 1,495 |
| Peak Decade | 2010s | 1950s |
| Gender | Girl | Girl |
| First Recorded Year | 1880 | 1880 |
Births by Decade
| Decade | Louisa | Lou |
| 1880s | 1,420 | 1,364 |
| 1890s | 1,272 | 1,283 |
| 1900s | 993 | 1,261 |
| 1910s | 1,619 | 2,550 |
| 1920s | 1,765 | 3,930 |
| 1930s | 1,227 | 5,165 |
| 1940s | 1,284 | 4,722 |
| 1950s | 1,442 | 9,084 |
| 1960s | 1,371 | 3,037 |
| 1970s | 1,005 | 767 |
| 1980s | 1,072 | 177 |
| 1990s | 1,084 | 65 |
| 2000s | 1,154 | 85 |
| 2010s | 2,939 | 255 |
| 2020s | 2,285 | 364 |
Recent Annual Births (2014–present)
| Year | Louisa | Lou |
| 2014 | 281 | 22 |
| 2015 | 303 | 29 |
| 2016 | 347 | 35 |
| 2017 | 373 | 30 |
| 2018 | 386 | 39 |
| 2019 | 422 | 40 |
| 2020 | 383 | 43 |
| 2021 | 424 | 54 |
| 2022 | 340 | 62 |
| 2023 | 346 | 69 |
| 2024 | 385 | 71 |
| 2025 | 407 | 65 |