Rebecca Dillehay
There are approximately 1 people named Rebecca Dillehay 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 Rebecca with Census Bureau frequency data for the surname Dillehay. 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 Rebecca
612K
Alive today
Named Dillehay
828
Alive today
US population
343M
Denominator
Estimated living: 612K
Rarity: Very Common
Gender: Female
Peak year: 1981
Average age: 48
Top Census group: White (82.7%)
Estimated bearers: 828
Rarity: Very Rare
Census rank: #33,884
Per 100K: 0.24
Top ancestry: White (88.4%)
First name trend
Rebecca: popularity over time
Year-by-year SSA birth registrations for the first name Rebecca. The peak year was 1981 with 16,801 births. The average person named Rebecca today is 48 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Rebecca
Self-reported race and ethnicity breakdown for people with the first name Rebecca, from the 2020 US Census Bureau first-name tables. The largest published group is White at 82.7%.
The bar chart below shows how people with the first name Rebecca 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 Rebecca at the time of the Census. A first name does not determine a person's race or ethnicity.
- White82.7% · 533,727
- Hispanic or Latino9.0% · 58,345
- Two or more races2.9% · 19,013
- Black or African American2.8% · 17,758
- Asian and Pacific Islander2.0% · 12,820
- American Indian and Alaska Native0.6% · 3,692
Ethnicity
Ancestry of the Dillehay surname
Self-reported race and ethnicity breakdown for people with the surname Dillehay, from the 2020 US Census Bureau. The largest group is White at 88.4%.
The bar chart below shows how people with the surname Dillehay 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 Dillehay at the time of the Census. A surname does not determine a person's race or ethnicity.
- White88.4% · 638
- Hispanic or Latino4.7% · 34
- Two or more races3.3% · 24
- Black or African American2.8% · 20
- Asian and Pacific Islander0.7% · 5
- American Indian and Alaska Native0.1% · 1
Methodology
How we calculated this
The first name Rebecca has a living-bearer frequency of 0.1786% of the US population, based on 612,259 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 Rebecca right now.
The surname Dillehay appears at a rate of 0.24 per 100,000 residents in the 2020 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 1 people with the full name Rebecca Dillehay. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Rebecca
Related
Other people with the surname Dillehay
FAQ
Rebecca Dillehay: questions and answers
How many people are named Rebecca Dillehay?
We estimate approximately 1 people in the United States share the full name Rebecca Dillehay. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.1786%) with the surname frequency (0.24 per 100K) against the current US population.
How rare is the name Rebecca Dillehay?
We classify Rebecca Dillehay as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Rebecca a male or female name?
Rebecca is predominantly female. Out of 757,198 total SSA registrations, 0.3% were male and 99.7% were female. See the full Rebecca 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 Rebecca Dillehay?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.