Lousie vs Lou

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

Name A

Lousie

Girl name

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Name B

Lou

Girl name · Rank #2524

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Which name is more popular?

Metric Lousie Lou
Current Rank Unranked #2524
Total Births (all years) 142 34,043
Peak Year 1918 1954
Peak Year Births 12 1,495
Peak Decade 1920ss 1950ss
Gender Girl Girl
First Recorded Year 1913 1880

Births by Decade

Decade Lousie Lou
1880ss — 1,364
1890ss — 1,283
1900ss — 1,261
1910ss 36 2,550
1920ss 57 3,930
1930ss 25 5,165
1940ss 7 4,722
1950ss 5 9,084
1960ss 12 3,037
1970ss — 767
1980ss — 177
1990ss — 65
2000ss — 85
2010ss — 255
2020ss — 298

Recent Annual Births (2014–present)

Year Lousie Lou
2014 — 22
2015 — 29
2016 — 35
2017 — 30
2018 — 39
2019 — 40
2020 — 43
2021 — 54
2022 — 62
2023 — 69
2024 — 70

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, 1913–1962.

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