How Many People Are Named Erin?
An estimated 304,342 people in the United States have the first name Erin. While not in the top 50, it remains a well-known name ranking #161 overall. It is predominantly female (97.1%). The average bearer is 39 years old, and Erin peaked in popularity in 1983 with 15,051 births that year.
Below you will find a full statistical profile of Erin 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 Erin paired with any surname.
Key Insights
- While Erin is overwhelmingly female, 9,455 male births have been registered with this name since 1880.
- Erin has fallen dramatically from its peak in the 1980s. Recent registrations are less than 5% of what they were at the name's height.
Estimated Living Americans
304,342
About 1 in 1,126 people in the U.S.
Rarity
Common
Predicted Gender
Female
97.1% confidence
Average Age
39
years old
Peak Year
1983
15,051 births
Total Registered
325,703
since 1880
Gender Distribution for Erin
Erin is predominantly female (97.1%), though 9,455 male births have been registered. It functions as a unisex name for a small percentage of bearers.
Erin as a male name
Ranked #3,616 in 2024
31 male births in 2024
Peak: 1974 (321 births)
Erin as a female name
Ranked #797 in 2024
352 female births in 2024
Peak: 1983 (14,837 births)
Erin: Popularity Over Time
SSA records for Erin span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 1980s, when 118,013 babies were registered. Erin has declined significantly from its peak in the 1980s. Recent registrations are a fraction of what they were at the name's height.
Erin by Decade
How has Erin 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 | 11 | 0 | 11 | |
| 1890s | 52 | 0 | 52 | |
| 1900s | 80 | 0 | 80 | |
| 1910s | 221 | 12 | 209 | |
| 1920s | 201 | 18 | 183 | |
| 1930s | 210 | 12 | 198 | |
| 1940s | 587 | 51 | 536 | |
| 1950s | 4,591 | 209 | 4,382 | |
| 1960s | 16,519 | 948 | 15,571 | |
| 1970s | 70,772 | 2,881 | 67,891 | |
| 1980s | 118,013 | 2,202 | 115,811 | |
| 1990s | 66,969 | 1,635 | 65,334 | |
| 2000s | 34,194 | 826 | 33,368 | |
| 2010s | 10,779 | 494 | 10,285 | |
| 2020s | 2,504 | 167 | 2,337 | |
Erin by State
Birth registrations for Erin span all 51 states and territories in the SSA database. The highest counts are in California, New York, Pennsylvania. The lowest are in Wyoming, Alaska, Vermont. On average, about 6,280 Erins were registered per state.
Erin + Last Name Combinations
How many people share a full name with Erin as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Erin
Other first names starting with E with a similar number of bearers.
Erin: Questions and Answers
How many people in the U.S. are named Erin?
We estimate approximately 304,342 people named Erin 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 1,126 Americans share this first name.
Is Erin a common name?
Erin is classified as "Common" and is more popular than 99.8% of all first names in the SSA database. A total of 325,703 births have been registered with this name since 1880.
When was Erin most popular?
Erin reached peak popularity in 1983, when 15,051 babies were given this name. The average age of a living person named Erin is approximately 39 years old, reflecting when the name was most commonly given.
Is Erin a female name?
Erin is predominantly female. 97.1% of people with this name are female. See the gender breakdown above for full details.
How many Erin Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Erin Smith, Erin Johnson, Erin 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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