Lou vs Louisa

Side-by-side comparison of Lou and Louisa — popularity rank, total births, peak decade, and historical trends from Social Security Administration data.

Name A

Lou

Girl name · Rank #2524

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Name B

Louisa

Girl name · Rank #733

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Which name is more popular?

Metric Lou Louisa
Current Rank #2524 #733
Total Births (all years) 34,043 21,523
Peak Year 1954 2021
Peak Year Births 1,495 424
Peak Decade 1950ss 2010ss
Gender Girl Girl
First Recorded Year 1880 1880

Births by Decade

Decade Lou Louisa
1880ss 1,364 1,420
1890ss 1,283 1,272
1900ss 1,261 993
1910ss 2,550 1,619
1920ss 3,930 1,765
1930ss 5,165 1,227
1940ss 4,722 1,284
1950ss 9,084 1,442
1960ss 3,037 1,371
1970ss 767 1,005
1980ss 177 1,072
1990ss 65 1,084
2000ss 85 1,154
2010ss 255 2,939
2020ss 298 1,876

Recent Annual Births (2014–present)

Year Lou Louisa
2014 22 281
2015 29 303
2016 35 347
2017 30 373
2018 39 386
2019 40 422
2020 43 383
2021 54 424
2022 62 340
2023 69 346
2024 70 383

Data Sources

Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications — National Data, ssa.gov/oact/babynames.
Source: SSA Annual Name Rankings, 1880–2024.

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