How Many People Are Named Marlo?
An estimated 9,550 people in the United States have the first name Marlo. It is used for both genders, with 66.6% female. The average bearer is 39 years old, and Marlo peaked in popularity in 1970 with 635 births that year.
Below you will find a full statistical profile of Marlo 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 Marlo paired with any surname.
Estimated Living Americans
9,550
About 1 in 35,891 people in the U.S.
Rarity
Rare
Predicted Gender
Female
66.6% confidence
Average Age
39
years old
Peak Year
1970
635 births
Total Registered
10,738
since 1880
Gender Distribution for Marlo
Marlo is a genuinely unisex name, used for both males (33.4%) and females (66.6%). Out of 10,738 total births registered, 3,583 were male and 7,155 were female.
Marlo as a male name
Ranked #1,689 in 2024
99 male births in 2024
Peak: 2023 (105 births)
Marlo as a female name
Ranked #1,707 in 2024
119 female births in 2024
Peak: 1970 (593 births)
Marlo: Popularity Over Time
SSA records for Marlo span from the 1910s to the 2020s, covering 12 decades of naming data. The most popular decade for this name was the 1970s, when 3,201 babies were registered. While Marlo is less common than at its peak in the 1970s, it remains a well-established name with steady registrations.
Marlo by Decade
How has Marlo 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.
Marlo by State
Birth registrations for Marlo span all 39 states and territories in the SSA database. The highest counts are in California, Texas, New York. The lowest are in Delaware, South Dakota, New Mexico. On average, about 134 Marlos were registered per state.
Marlo + Last Name Combinations
How many people share a full name with Marlo as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Marlo
Other first names starting with M with a similar number of bearers.
Marlo: Questions and Answers
How many people in the U.S. are named Marlo?
We estimate approximately 9,550 people named Marlo 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 35,891 Americans share this first name.
Is Marlo a common name?
Marlo is classified as "Rare" and is more popular than 97.6% of all first names in the SSA database. A total of 10,738 births have been registered with this name since 1880.
When was Marlo most popular?
Marlo reached peak popularity in 1970, when 635 babies were given this name. The average age of a living person named Marlo is approximately 39 years old, reflecting when the name was most commonly given.
Is Marlo a female name?
Marlo is predominantly female. 66.6% of people with this name are female. See the gender breakdown above for full details.
How many Marlo Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Marlo Smith, Marlo Johnson, Marlo 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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