How Many People Are Named Synthia?
An estimated 2,090 people in the United States have the first name Synthia. It is almost exclusively a female name. The average bearer is 44 years old, and Synthia peaked in popularity in 1965 with 67 births that year.
Below you will find a full statistical profile of Synthia 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 Synthia paired with any surname.
Estimated Living Americans
2,090
About 1 in 163,997 people in the U.S.
Rarity
Rare
Predicted Gender
Female
100.0% confidence
Average Age
44
years old
Peak Year
1965
67 births
Total Registered
2,421
since 1880
Gender Distribution for Synthia
Synthia is almost exclusively a female name. Out of 2,421 total births registered, 100.0% were female.
Synthia as a female name
Ranked #10,966 in 2024
9 female births in 2024
Peak: 1965 (67 births)
Synthia: Popularity Over Time
SSA records for Synthia span from the 1890s to the 2020s, covering 11 decades of naming data. The most popular decade for this name was the 1960s, when 511 babies were registered. Synthia has declined significantly from its peak in the 1960s. Recent registrations are a fraction of what they were at the name's height.
Synthia by Decade
How has Synthia 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.
Synthia by State
Birth registrations for Synthia span all 8 states and territories in the SSA database. The highest counts are in California, Texas, New York. The lowest are in Illinois, Ohio, Georgia. On average, about 64 Synthias were registered per state.
Synthia + Last Name Combinations
How many people share a full name with Synthia as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Synthia
Other first names starting with S with a similar number of bearers.
Synthia: Questions and Answers
How many people in the U.S. are named Synthia?
We estimate approximately 2,090 people named Synthia 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 163,997 Americans share this first name.
Is Synthia a common name?
Synthia is classified as "Rare" and is more popular than 93.9% of all first names in the SSA database. A total of 2,421 births have been registered with this name since 1880.
When was Synthia most popular?
Synthia reached peak popularity in 1965, when 67 babies were given this name. The average age of a living person named Synthia is approximately 44 years old, reflecting when the name was most commonly given.
Is Synthia a female name?
Synthia is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Synthia Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Synthia Smith, Synthia Johnson, Synthia 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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