Mary Harron
There are approximately 3 people named Mary Harron living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 114,251,446 Americans.
This estimate combines SSA birth records for the first name Mary with Census Bureau frequency data for the surname Harron. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Expected bearers
3
1 in 114,251,446
Named Mary
1.5M
Alive today
Named Harron
686
Alive today
US population
343M
Denominator
Estimated living: 1.5M
Rarity: Very Common
Gender: Female
Peak year: 1921
Average age: 65
Estimated bearers: 686
Rarity: Very Rare
Census rank: #37,544
Per 100K: 0.20
Top ancestry: White (89.2%)
First name trend
Mary: popularity over time
Year-by-year SSA birth registrations for the first name Mary. The peak year was 1921 with 74,171 births. The average person named Mary today is 65 years old.
Babies born per year
Ethnicity
Ancestry of the Harron surname
Self-reported race and ethnicity breakdown for people with the surname Harron, from the 2010 US Census Bureau. The largest group is White at 89.2%.
- White89.2%
- Black or African American6.6%
- Hispanic or Latino2.0%
- Two or more races1.2%
- Asian and Pacific Islander1.0%
Methodology
How we calculated this
The first name Mary has a living-bearer frequency of 0.4355% of the US population, based on 1,492,757 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Harron appears at a rate of 0.20 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0002%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 3 people with the full name Mary Harron. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Mary
FAQ
Mary Harron: questions and answers
How many people are named Mary Harron?
We estimate approximately 3 people in the United States share the full name Mary Harron. That works out to about 1 in 114,251,446 Americans. This is calculated by combining the first-name frequency (0.4355%) with the surname frequency (0.20 per 100K) against the current US population.
How rare is the name Mary Harron?
We classify Mary Harron as "Very Rare". About 1 in 114,251,446 Americans share this exact first and last name combination.
Is Mary a male or female name?
Mary is predominantly female. Out of 4,154,332 total SSA registrations, 0.4% were male and 99.6% were female. See the full Mary 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 2010 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.