Jeffrey Sladewski
There are approximately 1 people named Jeffrey Sladewski 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 Jeffrey with Census Bureau frequency data for the surname Sladewski. 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 Jeffrey
855K
Alive today
Named Sladewski
143
Alive today
US population
343M
Denominator
Estimated living: 855K
Rarity: Very Common
Gender: Male
Peak year: 1962
Average age: 54
Top Census group: White (86.9%)
Estimated bearers: 143
Rarity: Very Rare
Census rank: #138,300
Per 100K: 0.04
Top ancestry: White (87.2%)
First name trend
Jeffrey: popularity over time
Year-by-year SSA birth registrations for the first name Jeffrey. The peak year was 1962 with 33,614 births. The average person named Jeffrey today is 54 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Jeffrey
Self-reported race and ethnicity breakdown for people with the first name Jeffrey, from the 2020 US Census Bureau first-name tables. The largest published group is White at 86.9%.
The bar chart below shows how people with the first name Jeffrey 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 Jeffrey at the time of the Census. A first name does not determine a person's race or ethnicity.
- White86.9% · 639,256
- Black or African American4.5% · 33,124
- Hispanic or Latino3.7% · 27,286
- Asian and Pacific Islander2.3% · 16,702
- Two or more races2.2% · 16,220
- American Indian and Alaska Native0.4% · 2,836
Ethnicity
Ancestry of the Sladewski surname
Self-reported race and ethnicity breakdown for people with the surname Sladewski, from the 2020 US Census Bureau. The largest group is White at 87.2%.
The bar chart below shows how people with the surname Sladewski 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 Sladewski at the time of the Census. A surname does not determine a person's race or ethnicity.
- White87.2% · 109
- Hispanic or Latino7.2% · 9
- Asian and Pacific Islander3.2% · 4
- Two or more races1.6% · 2
- Black or African American0.8% · 1
Methodology
How we calculated this
The first name Jeffrey has a living-bearer frequency of 0.2493% of the US population, based on 854,629 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 Jeffrey right now.
The surname Sladewski appears at a rate of 0.04 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0000%.
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 Jeffrey Sladewski. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Jeffrey
Related
Other people with the surname Sladewski
FAQ
Jeffrey Sladewski: questions and answers
How many people are named Jeffrey Sladewski?
We estimate approximately 1 people in the United States share the full name Jeffrey Sladewski. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.2493%) with the surname frequency (0.04 per 100K) against the current US population.
How rare is the name Jeffrey Sladewski?
We classify Jeffrey Sladewski as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Jeffrey a male or female name?
Jeffrey is predominantly male. Out of 982,547 total SSA registrations, 99.6% were male and 0.4% were female. See the full Jeffrey 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 people have the full name Jeffrey Sladewski?
Our sister site HowManyOfMe.org answers how common the name Jeffrey Sladewski is at a glance, with the living-bearer count up front.