How Many People Are Named Siera?
An estimated 2,465 people in the United States have the first name Siera. It is almost exclusively a female name. The average bearer is 28 years old, and Siera peaked in popularity in 1998 with 150 births that year.
Below you will find a full statistical profile of Siera 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 Siera paired with any surname.
Estimated Living Americans
2,465
About 1 in 139,048 people in the U.S.
Rarity
Rare
Predicted Gender
Female
100.0% confidence
Average Age
28
years old
Peak Year
1998
150 births
Total Registered
2,536
since 1880
Gender Distribution for Siera
Siera is almost exclusively a female name. Out of 2,536 total births registered, 100.0% were female.
Siera as a female name
Ranked #11,967 in 2024
8 female births in 2024
Peak: 1998 (150 births)
Siera: Popularity Over Time
SSA records for Siera span from the 1980s to the 2020s, covering 5 decades of naming data. The most popular decade for this name was the 1990s, when 1,246 babies were registered. Siera has declined significantly from its peak in the 1990s. Recent registrations are a fraction of what they were at the name's height.
Siera by Decade
How has Siera 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.
Siera by State
Birth registrations for Siera span all 28 states and territories in the SSA database. The highest counts are in California, Florida, Ohio. The lowest are in Washington, South Carolina, Oregon. On average, about 36 Sieras were registered per state.
Siera + Last Name Combinations
How many people share a full name with Siera as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Siera
Other first names starting with S with a similar number of bearers.
Siera: Questions and Answers
How many people in the U.S. are named Siera?
We estimate approximately 2,465 people named Siera 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 139,048 Americans share this first name.
Is Siera a common name?
Siera is classified as "Rare" and is more popular than 94.5% of all first names in the SSA database. A total of 2,536 births have been registered with this name since 1880.
When was Siera most popular?
Siera reached peak popularity in 1998, when 150 babies were given this name. The average age of a living person named Siera is approximately 28 years old, reflecting when the name was most commonly given.
Is Siera a female name?
Siera is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Siera Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Siera Smith, Siera Johnson, Siera 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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