Alanna Oreilly
There are approximately 1 people named Alanna Oreilly living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 342,754,338 Americans.
This estimate combines SSA birth records for the first name Alanna with Census Bureau frequency data for the surname Oreilly. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
1
1 in 342,754,338
Named Alanna
25K
Alive today
Named Oreilly
14K
Alive today
US population
343M
Denominator
Estimated living: 25K
Rarity: Uncommon
Gender: Female
Peak year: 2024
Average age: 24
Top Census group: White (57.4%)
Estimated bearers: 14K
Rarity: Uncommon
Census rank: #2,913
Per 100K: 4.04
Top ancestry: White (89.0%)
First name trend
Alanna: popularity over time
Year-by-year SSA birth registrations for the first name Alanna. The peak year was 2024 with 1,096 births. The average person named Alanna today is 24 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Alanna
Self-reported race and ethnicity breakdown for people with the first name Alanna, from the 2020 US Census Bureau first-name tables. The largest published group is White at 57.4%.
The bar chart below shows how people with the first name Alanna described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the name Alanna at the time of the Census. A first name does not determine a person's race or ethnicity.
- White57.4% · 11,629
- Hispanic or Latino16.9% · 3,416
- Black or African American14.2% · 2,870
- Two or more races7.9% · 1,598
- Asian and Pacific Islander2.7% · 553
- American Indian and Alaska Native1.0% · 199
Ethnicity
Ancestry of the Oreilly surname
Self-reported race and ethnicity breakdown for people with the surname Oreilly, from the 2020 US Census Bureau. The largest group is White at 89.0%.
The bar chart below shows how people with the surname Oreilly described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the surname Oreilly at the time of the Census. A surname does not determine a person's race or ethnicity.
- White89.0% · 10,731
- Hispanic or Latino4.7% · 566
- Two or more races3.2% · 390
- Black or African American2.0% · 239
- Asian and Pacific Islander0.8% · 102
- American Indian and Alaska Native0.3% · 35
Methodology
How we calculated this
The first name Alanna has a living-bearer frequency of 0.0073% of the US population, based on 24,965 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
Even though the Census Bureau now publishes first-name tables, we do not use that file as the main first-name input for this estimate. The latest first-name Census snapshot is from 2020, which makes it 6 years old today. Because Census first-name data is only released once every 10 years, SSA birth records plus CDC survival rates give a better current estimate of how many people are likely alive with the name Alanna right now.
The surname Oreilly appears at a rate of 4.04 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0040%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 1 people with the full name Alanna Oreilly. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Alanna
Related
Other people with the surname Oreilly
FAQ
Alanna Oreilly: questions and answers
How many people are named Alanna Oreilly?
We estimate approximately 1 people in the United States share the full name Alanna Oreilly. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0073%) with the surname frequency (4.04 per 100K) against the current US population.
How rare is the name Alanna Oreilly?
We classify Alanna Oreilly as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Alanna a male or female name?
Alanna is predominantly female. Out of 25,913 total SSA registrations, 0.0% were male and 100.0% were female. See the full Alanna profile for detailed gender data.
Where does this data come from?
First-name data comes from the Social Security Administration's national baby name files (1880 to 2024). Surname data comes from the 2020 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.
How many Americans are named Alanna Oreilly?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.