How Many People Are Named Marni?
An estimated 3,035 people in the United States have the first name Marni. It is almost exclusively a female name. The average bearer is 47 years old, and Marni peaked in popularity in 1969 with 253 births that year.
Below you will find a full statistical profile of Marni 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 Marni paired with any surname.
Estimated Living Americans
3,035
About 1 in 112,934 people in the U.S.
Rarity
Rare
Predicted Gender
Female
99.9% confidence
Average Age
47
years old
Peak Year
1969
253 births
Total Registered
3,391
since 1880
Gender Distribution for Marni
Marni is almost exclusively a female name. Out of 3,391 total births registered, 99.9% were female.
Marni as a male name
Ranked #5,478 in 1972
5 male births in 1972
Peak: 1972 (5 births)
Marni as a female name
Ranked #9,968 in 2024
10 female births in 2024
Peak: 1969 (253 births)
Marni: Popularity Over Time
SSA records for Marni span from the 1940s to the 2020s, covering 9 decades of naming data. The most popular decade for this name was the 1970s, when 1,320 babies were registered. Marni has declined significantly from its peak in the 1970s. Recent registrations are a fraction of what they were at the name's height.
Marni by Decade
How has Marni 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.
Marni by State
Birth registrations for Marni span all 24 states and territories in the SSA database. The highest counts are in New York, California, Illinois. The lowest are in Oklahoma, North Carolina, Montana. On average, about 68 Marnis were registered per state.
Marni + Last Name Combinations
How many people share a full name with Marni as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Marni
Other first names starting with M with a similar number of bearers.
Marni: Questions and Answers
How many people in the U.S. are named Marni?
We estimate approximately 3,035 people named Marni 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 112,934 Americans share this first name.
Is Marni a common name?
Marni is classified as "Rare" and is more popular than 95.2% of all first names in the SSA database. A total of 3,391 births have been registered with this name since 1880.
When was Marni most popular?
Marni reached peak popularity in 1969, when 253 babies were given this name. The average age of a living person named Marni is approximately 47 years old, reflecting when the name was most commonly given.
Is Marni a female name?
Marni is predominantly female. 99.9% of people with this name are female. See the gender breakdown above for full details.
How many Marni Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Marni Smith, Marni Johnson, Marni 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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