Ruben Sierra
There are approximately 12 people named Ruben Sierra living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 28,562,862 Americans.
This estimate combines SSA birth records for the first name Ruben 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
12
1 in 28,562,862
Named Ruben
95K
Alive today
Named Sierra
42K
Alive today
US population
343M
Denominator
Estimated living: 95K
Rarity: Uncommon
Gender: Male
Peak year: 1992
Average age: 41
Estimated bearers: 42K
Rarity: Uncommon
Census rank: #973
Per 100K: 12.13
Top ancestry: Hispanic (90.6%)
First name trend
Ruben: popularity over time
Year-by-year SSA birth registrations for the first name Ruben. The peak year was 1992 with 1,814 births. The average person named Ruben today is 41 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 Ruben has a living-bearer frequency of 0.0279% of the US population, based on 95,482 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 12 people with the full name Ruben 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 Ruben
Related
Other people with the surname Sierra
FAQ
Ruben Sierra: questions and answers
How many people are named Ruben Sierra?
We estimate approximately 12 people in the United States share the full name Ruben Sierra. That works out to about 1 in 28,562,862 Americans. This is calculated by combining the first-name frequency (0.0279%) with the surname frequency (12.13 per 100K) against the current US population.
How rare is the name Ruben Sierra?
We classify Ruben Sierra as "Very Rare". About 1 in 28,562,862 Americans share this exact first and last name combination.
Is Ruben a male or female name?
Ruben is predominantly male. Out of 116,573 total SSA registrations, 99.4% were male and 0.6% were female. See the full Ruben 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.