Maureen Osullivan
There are approximately 4 people named Maureen Osullivan living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 85,688,585 Americans.
This estimate combines SSA birth records for the first name Maureen with Census Bureau frequency data for the surname Osullivan. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Expected bearers
4
1 in 85,688,585
Named Maureen
96K
Alive today
Named Osullivan
14K
Alive today
US population
343M
Denominator
Estimated living: 96K
Rarity: Uncommon
Gender: Female
Peak year: 1957
Average age: 64
Estimated bearers: 14K
Rarity: Uncommon
Census rank: #3,032
Per 100K: 4.01
Top ancestry: White (93.8%)
First name trend
Maureen: popularity over time
Year-by-year SSA birth registrations for the first name Maureen. The peak year was 1957 with 4,605 births. The average person named Maureen today is 64 years old.
Babies born per year
Ethnicity
Ancestry of the Osullivan surname
Self-reported race and ethnicity breakdown for people with the surname Osullivan, from the 2010 US Census Bureau. The largest group is White at 93.8%.
- White93.8%
- Hispanic or Latino2.3%
- Black or African American1.7%
- Two or more races1.2%
- Asian and Pacific Islander0.8%
- American Indian and Alaska Native0.2%
Methodology
How we calculated this
The first name Maureen has a living-bearer frequency of 0.0279% of the US population, based on 95,565 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Osullivan appears at a rate of 4.01 per 100,000 residents in the 2010 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 4 people with the full name Maureen Osullivan. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Maureen
Related
Other people with the surname Osullivan
FAQ
Maureen Osullivan: questions and answers
How many people are named Maureen Osullivan?
We estimate approximately 4 people in the United States share the full name Maureen Osullivan. That works out to about 1 in 85,688,585 Americans. This is calculated by combining the first-name frequency (0.0279%) with the surname frequency (4.01 per 100K) against the current US population.
How rare is the name Maureen Osullivan?
We classify Maureen Osullivan as "Very Rare". About 1 in 85,688,585 Americans share this exact first and last name combination.
Is Maureen a male or female name?
Maureen is predominantly female. Out of 144,573 total SSA registrations, 0.2% were male and 99.8% were female. See the full Maureen 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.