How Many People Are Named Seidy?
An estimated 339 people in the United States have the first name Seidy. It is almost exclusively a female name. The average bearer is 18 years old, and Seidy peaked in popularity in 2013 with 19 births that year.
Below you will find a full statistical profile of Seidy 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 Seidy paired with any surname.
Estimated Living Americans
339
About 1 in 1,011,075 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
18
years old
Peak Year
2013
19 births
Total Registered
344
since 1880
Gender Distribution for Seidy
Seidy is almost exclusively a female name. Out of 344 total births registered, 100.0% were female.
Seidy as a female name
Ranked #8,845 in 2024
12 female births in 2024
Peak: 2013 (19 births)
Seidy: Popularity Over Time
SSA records for Seidy span from the 1990s to the 2020s, covering 4 decades of naming data. The most popular decade for this name was the 2000s, when 132 babies were registered. While Seidy is less common than at its peak in the 2000s, it remains a well-established name with steady registrations.
Seidy by Decade
How has Seidy 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.
Seidy by State
Seidy + Last Name Combinations
How many people share a full name with Seidy as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Seidy
Other first names starting with S with a similar number of bearers.
Seidy: Questions and Answers
How many people in the U.S. are named Seidy?
We estimate approximately 339 people named Seidy 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 1,011,075 Americans share this first name.
Is Seidy a common name?
Seidy is classified as "Very Rare" and is more popular than 80.5% of all first names in the SSA database. A total of 344 births have been registered with this name since 1880.
When was Seidy most popular?
Seidy reached peak popularity in 2013, when 19 babies were given this name. The average age of a living person named Seidy is approximately 18 years old, reflecting when the name was most commonly given.
Is Seidy a female name?
Seidy is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Seidy Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Seidy Smith, Seidy Johnson, Seidy 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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