How Many People Are Named Sinthia?
An estimated 251 people in the United States have the first name Sinthia. It is almost exclusively a female name. The average bearer is 27 years old, and Sinthia peaked in popularity in 2000 with 19 births that year.
Below you will find a full statistical profile of Sinthia 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 Sinthia paired with any surname.
Estimated Living Americans
251
About 1 in 1,365,555 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
27
years old
Peak Year
2000
19 births
Total Registered
258
since 1880
Gender Distribution for Sinthia
Sinthia is almost exclusively a female name. Out of 258 total births registered, 100.0% were female.
Sinthia as a female name
Ranked #17,265 in 2023
5 female births in 2023
Peak: 2000 (19 births)
Sinthia: Popularity Over Time
SSA records for Sinthia span from the 1970s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 2000s, when 102 babies were registered. Sinthia has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Sinthia by Decade
How has Sinthia 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.
Sinthia by State
Sinthia + Last Name Combinations
How many people share a full name with Sinthia as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Sinthia
Other first names starting with S with a similar number of bearers.
Sinthia: Questions and Answers
How many people in the U.S. are named Sinthia?
We estimate approximately 251 people named Sinthia 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 1,365,555 Americans share this first name.
Is Sinthia a common name?
Sinthia is classified as "Very Rare" and is more popular than 77.1% of all first names in the SSA database. A total of 258 births have been registered with this name since 1880.
When was Sinthia most popular?
Sinthia reached peak popularity in 2000, when 19 babies were given this name. The average age of a living person named Sinthia is approximately 27 years old, reflecting when the name was most commonly given.
Is Sinthia a female name?
Sinthia is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Sinthia Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Sinthia Smith, Sinthia Johnson, Sinthia 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.
Search for a full name combination
How Many of Me