How Many People Are Named Alexa Costello?

There are approximately 13 people named Alexa Costello living in the United States today. That makes this name combination rare, occurring at a rate of about 1 in 26,365,718 Americans.

This estimate combines SSA birth records for the first name Alexa with Census Bureau frequency data for the surname Costello. Below you will find a breakdown of both names, including popularity trends, gender data, and Census background data where it is available.

Estimated People with This Name

1 in 26,365,718 Americans

Combination Rarity

Rare

Very Rare Very Common

First Name

Alexa

Last Name

Costello

Alexa: Popularity Over Time

Year-by-year SSA birth registrations for the first name Alexa. The peak year was 2006 with 6,125 births. The average person named Alexa today is 21 years old.

Male

Female

Ancestry of the First Name Alexa

These percentages describe the people who had the first name Alexa in the 2020 Census. They do not tell you the deeper origin or meaning of the name itself.

Read this as a snapshot of who already had the name in 2020, not as a trend line. The SSA chart above is still the better way to see how Alexa rose or fell over time.

White

49.22%

Black

2.67%

Hispanic

42.34%

Asian/Pacific Islander

1.82%

American Indian/Alaska Native

0.28%

Two or More Races

3.67%

Ancestry of the Costello Surname

The surname Costello was most commonly recorded among people who identified as White in the 2020 Census.

This is a self-reported race and ethnicity breakdown for people who had the surname Costello in the published Census surname tables. It gives useful context around who was recorded with the name, but it does not tell the full family history of every Boone line.

White

87.54%

Black

1.47%

Hispanic

7.08%

Asian/Pacific Islander

0.83%

American Indian/Alaska Native

0.27%

Two or More Races

2.81%

How we calculated this

The first name "Alexa" has an estimated frequency of 0.0376% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.

The surname "Costello" appears at a rate of 10.28 per 100,000 people in the 2020 U.S. Census.

We do not use the Census first-name snapshot for the main estimate because it is only published once every 10 years. The latest public first-name Census file is from 2020, which is already 6 years old. SSA birth records plus CDC survival data give a better current estimate of how many people with the first name Alexa are likely to be alive now.

Multiplying these frequencies against the U.S. population of ~343 million gives 13 estimated people. This assumes first names and last names are statistically independent. Full methodology.

Other people named Alexa

Alexa Smith Alexa Johnson Alexa Williams Alexa Brown Alexa Jones Alexa Garcia Alexa Vega Alexa Padilla

Other people with the surname Costello

Michael Costello James Costello John Costello David Costello Robert Costello William Costello Jerry Costello

Alexa Costello: Questions and Answers

How many people are named Alexa Costello?

We estimate approximately 13 people named Alexa Costello are alive in the United States today. The first name Alexa is shared by 128,800 Americans, and the surname Costello is shared by 35,237.

How rare is the name Alexa Costello?

This name combination is classified as Rare, occurring at a rate of about 1 in 26,365,718 Americans. The first name Alexa is common and the surname Costello is uncommon.

Is Alexa a male or female name?

Alexa is predominantly female, with 0.2% of bearers being male and 99.8% female. It peaked in popularity in 2006 and the average bearer today is 21 years old.

What does the Census say about the first name Alexa?

In the 2020 Census, the first name Alexa was most commonly recorded among people who identified as White (49.22%). The next largest recorded groups were Hispanic (42.34%) and Two or More Races (3.67%). These percentages describe the people who had the name in the 2020 Census, not the deeper origin of the name itself.

Where does this data come from?

First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. When available, first-name Census background data comes from the 2020 U.S. Census Bureau first-name tables. Surname data comes from the 2020 U.S. Census Bureau. Full methodology.

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