How Many People Are Named Moira?
An estimated 6,869 people in the United States have the first name Moira. It is almost exclusively a female name. The average bearer is 36 years old, and Moira peaked in popularity in 1963 with 144 births that year.
Below you will find a full statistical profile of Moira 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 Moira paired with any surname.
Estimated Living Americans
6,869
About 1 in 49,899 people in the U.S.
Rarity
Rare
Predicted Gender
Female
100.0% confidence
Average Age
36
years old
Peak Year
1963
144 births
Total Registered
7,847
since 1880
Gender Distribution for Moira
Moira is almost exclusively a female name. Out of 7,847 total births registered, 100.0% were female.
Moira as a female name
Ranked #1,901 in 2024
105 female births in 2024
Peak: 1963 (144 births)
Moira: Popularity Over Time
SSA records for Moira span from the 1910s to the 2020s, covering 12 decades of naming data. The most popular decade for this name was the 2000s, when 1,215 babies were registered. While Moira is less common than at its peak in the 2000s, it remains a well-established name with steady registrations.
Moira by Decade
How has Moira 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.
Moira by State
Birth registrations for Moira span all 28 states and territories in the SSA database. The highest counts are in New York, California, Illinois. The lowest are in Oklahoma, Missouri, Kansas. On average, about 153 Moiras were registered per state.
Moira + Last Name Combinations
How many people share a full name with Moira as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Moira
Other first names starting with M with a similar number of bearers.
Moira: Questions and Answers
How many people in the U.S. are named Moira?
We estimate approximately 6,869 people named Moira 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 49,899 Americans share this first name.
Is Moira a common name?
Moira is classified as "Rare" and is more popular than 97.1% of all first names in the SSA database. A total of 7,847 births have been registered with this name since 1880.
When was Moira most popular?
Moira reached peak popularity in 1963, when 144 babies were given this name. The average age of a living person named Moira is approximately 36 years old, reflecting when the name was most commonly given.
Is Moira a female name?
Moira is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Moira Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Moira Smith, Moira Johnson, Moira 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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