How Many People Are Named Kathleen?
An estimated 452,244 people in the United States have the first name Kathleen. While not in the top 50, it remains a well-known name ranking #94 overall. It is almost exclusively a female name. The average bearer is 63 years old, and Kathleen peaked in popularity in 1951 with 26,749 births that year. It has a similar number of bearers to Victoria (446,973).
Below you will find a full statistical profile of Kathleen as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, state-by-state birth registrations, and, when available, a 2020 Census snapshot showing who had the name at that point in time. You can also check how many people share the full name Kathleen paired with any surname.
Key Insights
- While Kathleen is overwhelmingly female, 1,691 male births have been registered with this name since 1880.
- Kathleen has fallen dramatically from its peak in the 1950s. Recent registrations are less than 5% of what they were at the name's height.
Estimated Living Americans
452,244
About 1 in 758 people in the U.S.
Rarity
Common
Predicted Gender
Female
99.8% confidence
Average Age
63
years old
Peak Year
1951
26,749 births
Total Registered
715,129
since 1880
Gender Distribution for Kathleen
Kathleen is almost exclusively a female name. Out of 715,129 total births registered, 99.8% were female.
Kathleen as a male name
Ranked #8,890 in 1991
5 male births in 1991
Peak: 1949 (56 births)
Kathleen as a female name
Ranked #1,109 in 2024
220 female births in 2024
Peak: 1951 (26,716 births)
Kathleen in the 2020 Census
The 2020 Census recorded 547,321 people with the first name Kathleen, which placed it at #77 in the published first-name tables. This is a snapshot of people who already had the name in 2020. The estimated living count elsewhere on this page is different: it is a current estimate built from SSA birth records and age-based survival rates, so the two figures are not expected to match exactly.
Read this section as a snapshot of people who already had the name in 2020. The SSA charts elsewhere on this page are still the better way to see how the name rose, fell, or shifted across generations.
Gender in the 2020 Census
In the 2020 Census, Kathleen was recorded as predominantly female. Out of 547,321 people with this name in that snapshot, 0.1% were male and 99.9% were female. That is very close to the long-run birth pattern in SSA records, where the name is female 99.8% of the time.
Census Count
547,321
people with this name
Census Rank
#77
among Census first names
Frequency Rate
181.21
per 100,000 people
Recorded Race and Hispanic Origin in the 2020 Census
In the 2020 Census, the first name Kathleen was most commonly recorded among people who identified as White (92.72%). The next largest recorded groups were Hispanic (2.41%) and Black (1.66%).
These percentages describe the people who had the first name Kathleen in the 2020 Census. They do not tell you the deeper meaning or origin of the name itself.
2020 Census demographic breakdown
Each row shows a recorded Census category for people with the first name Kathleen.
| Group | Share | Count |
|---|---|---|
| White | 92.72% | 507,449 |
| Hispanic | 2.41% | 13,171 |
| Black | 1.66% | 9,084 |
| Two or More Races | 1.64% | 8,949 |
| Asian and Pacific Islander | 1.27% | 6,966 |
| American Indian and Alaska Native | 0.31% | 1,698 |
The Census published separate sex and race/origin tables for first names, so their total counts can differ slightly for the same name. That is why the race section focuses on the demographic mix rather than repeating a second headline count.
Kathleen: Popularity Over Time
SSA records for Kathleen span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 1950s, when 224,735 babies were registered. Kathleen has declined significantly from its peak in the 1950s. Recent registrations are a fraction of what they were at the name's height.
Kathleen by Decade
How has Kathleen 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 | 389 | 0 | 389 | |
| 1890s | 1,942 | 0 | 1,942 | |
| 1900s | 3,924 | 0 | 3,924 | |
| 1910s | 16,606 | 14 | 16,592 | |
| 1920s | 33,679 | 82 | 33,597 | |
| 1930s | 34,708 | 158 | 34,550 | |
| 1940s | 153,343 | 362 | 152,981 | |
| 1950s | 224,735 | 394 | 224,341 | |
| 1960s | 121,250 | 300 | 120,950 | |
| 1970s | 45,024 | 178 | 44,846 | |
| 1980s | 39,579 | 184 | 39,395 | |
| 1990s | 24,866 | 19 | 24,847 | |
| 2000s | 10,065 | 0 | 10,065 | |
| 2010s | 3,808 | 0 | 3,808 | |
| 2020s | 1,211 | 0 | 1,211 | |
Kathleen by State
Birth registrations for Kathleen span all 51 states and territories in the SSA database. The highest counts are in New York, Pennsylvania, California. The lowest are in Alaska, Wyoming, Nevada. On average, about 13,843 Kathleens were registered per state.
Kathleen + Last Name Combinations
How many people share a full name with Kathleen as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Kathleen
Other first names starting with K with a similar number of bearers.
Kathleen: Questions and Answers
How many people in the U.S. are named Kathleen?
We estimate approximately 452,244 people named Kathleen 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 758 Americans share this first name.
Is Kathleen a common name?
Kathleen is classified as "Common" and is more popular than 99.9% of all first names in the SSA database. A total of 715,129 births have been registered with this name since 1880.
When was Kathleen most popular?
Kathleen reached peak popularity in 1951, when 26,749 babies were given this name. The average age of a living person named Kathleen is approximately 63 years old, reflecting when the name was most commonly given.
How common was Kathleen in the 2020 Census?
The 2020 Census recorded 547,321 people with the first name Kathleen. That placed it at #77 in the published Census first-name tables, or 181.21 people per 100,000.
Why is the Census count different from the living estimate?
Because they measure different things. The Census number is a count of people with the name in 2020. The living estimate is a current model based on SSA birth records and survival rates, so it aims to estimate how many people with the name are alive now.
What does the SSA popularity chart show?
The popularity chart tracks birth registrations, not people currently alive. It shows how often Kathleen was given to babies from 1880 through 2024, which is why it is the best tool on the page for seeing long-run naming trends.
What does the Census say about the gender split for Kathleen?
In the 2020 Census snapshot, Kathleen was recorded as predominantly female. The published split was 0.1% male and 99.9% female.
What does the Census say about the background of people named Kathleen?
In the 2020 Census, the first name Kathleen was most commonly recorded among people who identified as White (92.72%). The next largest recorded groups were Hispanic (2.41%) and Black (1.66%). These percentages describe the people who had the name in the 2020 Census, not the deeper meaning or origin of the name itself.
Why can the Census sex total and race total differ slightly?
The Census published separate first-name tables for sex and for race and Hispanic origin. Those totals can differ slightly for the same name, so the page uses them as two related snapshots rather than treating them as perfectly interchangeable counts.
Does every first name have Census demographic data?
No. The public Census first-name tables only include names that met the Bureau's publication rules. That means some names on this site will have SSA history but no published Census demographic snapshot.
Is Kathleen a female name?
Kathleen is predominantly female. 99.8% of people with this name are female. See the gender breakdown above for full details.
Why can Kathleen have a lot of living bearers even if it is not trendy now?
Because a name can build up a large population over many decades. Kathleen peaked in 1951, and the average living bearer is about 63 years old, so a name can still have millions of living bearers even after it stops feeling current for newborns.
How many Kathleen Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Kathleen Smith, Kathleen Johnson, Kathleen 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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