Gregory Sierra
There are approximately 73 people named Gregory Sierra living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 4,695,265 Americans.
This estimate combines SSA birth records for the first name Gregory with Census Bureau frequency data for the surname Sierra. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Expected bearers
73
1 in 4,695,265
Named Gregory
604K
Alive today
Named Sierra
42K
Alive today
US population
343M
Denominator
Estimated living: 604K
Rarity: Very Common
Gender: Male
Peak year: 1962
Average age: 55
Estimated bearers: 42K
Rarity: Uncommon
Census rank: #973
Per 100K: 12.13
Top ancestry: Hispanic (90.6%)
First name trend
Gregory: popularity over time
Year-by-year SSA birth registrations for the first name Gregory. The peak year was 1962 with 22,058 births. The average person named Gregory today is 55 years old.
Babies born per year
Ethnicity
Ancestry of the Sierra surname
Self-reported race and ethnicity breakdown for people with the surname Sierra, from the 2010 US Census Bureau. The largest group is Hispanic at 90.6%.
- Hispanic or Latino90.6%
- White7.2%
- Black or African American0.7%
- Asian and Pacific Islander0.6%
- American Indian and Alaska Native0.5%
- Two or more races0.3%
Methodology
How we calculated this
The first name Gregory has a living-bearer frequency of 0.1761% of the US population, based on 603,591 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Sierra appears at a rate of 12.13 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0121%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 73 people with the full name Gregory Sierra. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Gregory
Related
Other people with the surname Sierra
FAQ
Gregory Sierra: questions and answers
How many people are named Gregory Sierra?
We estimate approximately 73 people in the United States share the full name Gregory Sierra. That works out to about 1 in 4,695,265 Americans. This is calculated by combining the first-name frequency (0.1761%) with the surname frequency (12.13 per 100K) against the current US population.
How rare is the name Gregory Sierra?
We classify Gregory Sierra as "Very Rare". About 1 in 4,695,265 Americans share this exact first and last name combination.
Is Gregory a male or female name?
Gregory is predominantly male. Out of 714,266 total SSA registrations, 99.6% were male and 0.4% were female. See the full Gregory 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.