How Many People Are Named Tilly?
An estimated 2,310 people in the United States have the first name Tilly. It is almost exclusively a female name. The average bearer is 10 years old, and Tilly peaked in popularity in 2024 with 273 births that year.
Below you will find a full statistical profile of Tilly 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 Tilly paired with any surname.
Key Insights
- Tilly is a modern name. With an average bearer age of just 10, it has gained most of its popularity in recent years.
Estimated Living Americans
2,310
About 1 in 148,379 people in the U.S.
Rarity
Rare
Predicted Gender
Female
100.0% confidence
Average Age
10
years old
Peak Year
2024
273 births
Total Registered
2,395
since 1880
Gender Distribution for Tilly
Tilly is almost exclusively a female name. Out of 2,395 total births registered, 100.0% were female.
Tilly as a female name
Ranked #953 in 2024
273 female births in 2024
Peak: 2024 (273 births)
Tilly: Popularity Over Time
SSA records for Tilly span from the 1910s to the 2020s, covering 12 decades of naming data. The most popular decade for this name was the 2020s, when 1,148 babies were registered. Tilly remains highly popular today, with recent registration numbers near its historical peak.
Tilly by Decade
How has Tilly 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.
Tilly by State
Birth registrations for Tilly span all 33 states and territories in the SSA database. The highest counts are in Texas, California, New York. The lowest are in Mississippi, Alabama, South Dakota. On average, about 39 Tillys were registered per state.
Tilly + Last Name Combinations
How many people share a full name with Tilly as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Tilly
Other first names starting with T with a similar number of bearers.
Tilly: Questions and Answers
How many people in the U.S. are named Tilly?
We estimate approximately 2,310 people named Tilly 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 148,379 Americans share this first name.
Is Tilly a common name?
Tilly is classified as "Rare" and is more popular than 94.3% of all first names in the SSA database. A total of 2,395 births have been registered with this name since 1880.
When was Tilly most popular?
Tilly reached peak popularity in 2024, when 273 babies were given this name. The average age of a living person named Tilly is approximately 10 years old, reflecting when the name was most commonly given.
Is Tilly a female name?
Tilly is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Tilly Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Tilly Smith, Tilly Johnson, Tilly 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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