How Many People Are Named Louisa?
An estimated 11,875 people in the United States have the first name Louisa. It is almost exclusively a female name. The average bearer is 34 years old, and Louisa peaked in popularity in 2021 with 424 births that year.
Below you will find a full statistical profile of Louisa as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Louisa paired with any surname.
Estimated Living Americans
11,875
About 1 in 28,864 people in the U.S.
Rarity
Uncommon
Predicted Gender
Female
100.0% confidence
Average Age
34
years old
Peak Year
2021
424 births
Total Registered
21,528
since 1880
Gender Distribution for Louisa
Louisa is almost exclusively a female name. Out of 21,528 total births registered, 100.0% were female.
Louisa as a male name
Ranked #4,697 in 1922
5 male births in 1922
Peak: 1922 (5 births)
Louisa as a female name
Ranked #733 in 2024
383 female births in 2024
Peak: 2021 (424 births)
Louisa: Popularity Over Time
SSA records for Louisa span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 2010s, when 2,939 babies were registered. While Louisa is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Louisa by Decade
How has Louisa tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
| Decade | Total | Male | Female | |
|---|---|---|---|---|
| 1880s | 1,420 | 0 | 1,420 | |
| 1890s | 1,272 | 0 | 1,272 | |
| 1900s | 993 | 0 | 993 | |
| 1910s | 1,619 | 0 | 1,619 | |
| 1920s | 1,770 | 5 | 1,765 | |
| 1930s | 1,227 | 0 | 1,227 | |
| 1940s | 1,284 | 0 | 1,284 | |
| 1950s | 1,442 | 0 | 1,442 | |
| 1960s | 1,371 | 0 | 1,371 | |
| 1970s | 1,005 | 0 | 1,005 | |
| 1980s | 1,072 | 0 | 1,072 | |
| 1990s | 1,084 | 0 | 1,084 | |
| 2000s | 1,154 | 0 | 1,154 | |
| 2010s | 2,939 | 0 | 2,939 | |
| 2020s | 1,876 | 0 | 1,876 | |
Louisa by State
Birth registrations for Louisa span all 46 states and territories in the SSA database. The highest counts are in New York, California, Texas. The lowest are in Nevada, New Hampshire, Alaska. On average, about 254 Louisas were registered per state.
Louisa + Last Name Combinations
How many people share a full name with Louisa as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Louisa
Other first names starting with L with a similar number of bearers.
Louisa: Questions and Answers
How many people in the U.S. are named Louisa?
We estimate approximately 11,875 people named Louisa are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 28,864 Americans share this first name.
Is Louisa a common name?
Louisa is classified as "Uncommon" and is more popular than 97.9% of all first names in the SSA database. A total of 21,528 births have been registered with this name since 1880.
When was Louisa most popular?
Louisa reached peak popularity in 2021, when 424 babies were given this name. The average age of a living person named Louisa is approximately 34 years old, reflecting when the name was most commonly given.
Is Louisa a female name?
Louisa is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Louisa Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Louisa Smith, Louisa Johnson, Louisa Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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