How Many People Are Named In?
An estimated 21 people in the United States have the first name In. It is used for both genders, with 80.8% female. The average bearer is 56 years old, and In peaked in popularity in 1956 with 6 births that year.
Below you will find a full statistical profile of In 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 In paired with any surname.
Key Insights
- In is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
21
About 1 in 16,321,635 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
80.8% confidence
Average Age
56
years old
Peak Year
1956
6 births
Total Registered
26
since 1880
Gender Distribution for In
In is predominantly female (80.8%), though 5 male births have been registered. It functions as a unisex name for a small percentage of bearers.
In as a male name
Ranked #8,949 in 1992
5 male births in 1992
Peak: 1992 (5 births)
In as a female name
Ranked #11,106 in 1982
5 female births in 1982
Peak: 1956 (6 births)
In: Popularity Over Time
SSA records for In span from the 1950s to the 1990s, covering 3 decades of naming data. The most popular decade for this name was the 1950s, when 16 babies were registered. While In is less common than at its peak in the 1950s, it remains a well-established name with steady registrations.
In by Decade
How has In 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.
In by State
In + Last Name Combinations
How many people share a full name with In as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to In
Other first names starting with I with a similar number of bearers.
In: Questions and Answers
How many people in the U.S. are named In?
We estimate approximately 21 people named In 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 16,321,635 Americans share this first name.
Is In a common name?
In is classified as "Very Rare" and is more popular than 40.8% of all first names in the SSA database. A total of 26 births have been registered with this name since 1880.
When was In most popular?
In reached peak popularity in 1956, when 6 babies were given this name. The average age of a living person named In is approximately 56 years old, reflecting when the name was most commonly given.
Is In a female name?
In is predominantly female. 80.8% of people with this name are female. See the gender breakdown above for full details.
How many In Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: In Smith, In Johnson, In 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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