How Many People Are Named Cecily?
An estimated 7,642 people in the United States have the first name Cecily. It is almost exclusively a female name. The average bearer is 31 years old, and Cecily peaked in popularity in 1989 with 472 births that year.
Below you will find a full statistical profile of Cecily 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 Cecily paired with any surname.
Estimated Living Americans
7,642
About 1 in 44,851 people in the U.S.
Rarity
Rare
Predicted Gender
Female
100.0% confidence
Average Age
31
years old
Peak Year
1989
472 births
Total Registered
8,535
since 1880
Gender Distribution for Cecily
Cecily is almost exclusively a female name. Out of 8,535 total births registered, 100.0% were female.
Cecily as a female name
Ranked #1,595 in 2024
131 female births in 2024
Peak: 1989 (472 births)
Cecily: Popularity Over Time
SSA records for Cecily span from the 1910s to the 2020s, covering 12 decades of naming data. The most popular decade for this name was the 2010s, when 1,632 babies were registered. While Cecily is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Cecily by Decade
How has Cecily 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.
Cecily by State
Birth registrations for Cecily span all 35 states and territories in the SSA database. The highest counts are in California, Texas, New York. The lowest are in South Carolina, Oklahoma, New Hampshire. On average, about 126 Cecilys were registered per state.
Cecily + Last Name Combinations
How many people share a full name with Cecily as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Cecily
Other first names starting with C with a similar number of bearers.
Cecily: Questions and Answers
How many people in the U.S. are named Cecily?
We estimate approximately 7,642 people named Cecily 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 44,851 Americans share this first name.
Is Cecily a common name?
Cecily is classified as "Rare" and is more popular than 97.3% of all first names in the SSA database. A total of 8,535 births have been registered with this name since 1880.
When was Cecily most popular?
Cecily reached peak popularity in 1989, when 472 babies were given this name. The average age of a living person named Cecily is approximately 31 years old, reflecting when the name was most commonly given.
Is Cecily a female name?
Cecily is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Cecily Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Cecily Smith, Cecily Johnson, Cecily 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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