How Many People Are Named Phi?
An estimated 503 people in the United States have the first name Phi. It is predominantly male (91.3%). The average bearer is 33 years old, and Phi peaked in popularity in 1992 with 26 births that year.
Below you will find a full statistical profile of Phi 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 Phi paired with any surname.
Estimated Living Americans
503
About 1 in 681,420 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
91.3% confidence
Average Age
33
years old
Peak Year
1992
26 births
Total Registered
519
since 1880
Gender Distribution for Phi
Phi is predominantly male (91.3%), though 45 female births have been registered. It functions as a unisex name for a small percentage of bearers.
Phi as a male name
Ranked #7,898 in 2015
10 male births in 2015
Peak: 1992 (26 births)
Phi as a female name
Ranked #19,507 in 2009
5 female births in 2009
Peak: 1996 (8 births)
Phi: Popularity Over Time
SSA records for Phi span from the 1970s to the 2010s, covering 5 decades of naming data. The most popular decade for this name was the 1980s, when 190 babies were registered. Phi has declined significantly from its peak in the 1980s. Recent registrations are a fraction of what they were at the name's height.
Phi by Decade
How has Phi 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.
Phi by State
Phi + Last Name Combinations
How many people share a full name with Phi as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Phi
Other first names starting with P with a similar number of bearers.
Phi: Questions and Answers
How many people in the U.S. are named Phi?
We estimate approximately 503 people named Phi 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 681,420 Americans share this first name.
Is Phi a common name?
Phi is classified as "Very Rare" and is more popular than 84.6% of all first names in the SSA database. A total of 519 births have been registered with this name since 1880.
When was Phi most popular?
Phi reached peak popularity in 1992, when 26 babies were given this name. The average age of a living person named Phi is approximately 33 years old, reflecting when the name was most commonly given.
Is Phi a male name?
Phi is predominantly male. 91.3% of people with this name are male. See the gender breakdown above for full details.
How many Phi Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Phi Smith, Phi Johnson, Phi 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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