Baby Names US
boys' name ★ peaked 1916

Isadore

Gender Boy · 3% girls Rank 2025 #5,963

A non-standard variant of Isidore, possibly inspired by the well-known feminine variant Isadora of Isidora.

Rank 2025
#5,963
among boys · ↑2,636 vs 2024
Babies in 2025
15
named Isadore
How common
1 in 113,872
boys born in 2025
Peak year
1916
285 babies
All-time total
5,909
#1,641 all-time among boys
First recorded
1880
in Social Security records

Isadore popularity over time

5,909 babies have been named Isadore since 1880, according to official Social Security records. Switch measure to see births per year or the yearly rank.

Measure
Births per 1,000 babies of that sex, comparable across eras
0.130.250.380.518801900192019401960198020002020BoysGirls
BoysGirls

By decade. Change compares yearly averages, so the current partial decade is on equal footing. Best rank is the name's best yearly rank within the decade.

Decade Girls Boys Total Per year Change Best rank
1880s 11 93 104 10 – #530
1890s 24 174 198 20 +90% #376
1900s 26 350 376 38 +90% #291
1910s 65 1,980 2,045 205 +444% #274
1920s 21 1,364 1,385 139 -32% #417
1930s – 443 443 44 -68% #786
1940s – 295 295 30 -33% #1,041
1950s – 271 271 27 -8% #1,203
1960s – 170 170 17 -37% #1,605
1970s – 131 131 13 -23% #2,339
1980s – 90 90 9 -31% #3,704
1990s – 82 82 8 -9% #4,899
2000s – 92 92 9 +12% #5,858
2010s 27 95 122 12 +33% #5,930
2020s (to 2025) 21 84 105 18 +43% #4,928

The story of Isadore

Isadore is rare for boys in the United States, ranked #5,963 in 2025 with 15 babies given the name. It is currently rising compared with a decade ago.

Since 1880, 5,909 American babies have been named Isadore. Its peak came in 1916, when 285 newborns received the name, the signature sound of the 1910s.

The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Isadore stood among all boys' names in any year, or use the compare tool to plot it against other names.

How old are people named Isadore?

The median living Isadore is about 54 years old; half are between 23 and 72. An estimated 1,200 people named Isadore are alive in the United States today.

median 54 020406080100

Estimated from births per year and Social Security period life tables; an approximation of the living age distribution, by age in years.

Isadore year by year

Every year since 2001, and five-year steps back to 1880. Rank is within each sex.

Year Girls Girls rank Boys Boys rank
2025 – – 15 #5,963
2024 8 #11,510 9 #8,599
2023 – – 10 #7,937
2022 – – 12 #6,981
2021 5 #16,198 19 #5,000
2020 8 #11,493 19 #4,928
2019 – – 15 #5,930
2018 5 #16,620 10 #7,818
2017 7 #13,260 13 #6,457
2016 – – 13 #6,492
2015 6 #15,230 10 #7,704
2014 9 #11,342 10 #7,783
2013 – – 9 #8,368
2012 – – – –
2011 – – 7 #10,024
2010 – – 8 #9,114
2009 – – 9 #8,566
2008 – – 14 #6,202
2007 – – 9 #8,462
2006 – – 8 #9,032
2005 – – 9 #7,891
2004 – – 8 #8,432
2003 – – 9 #7,482
2002 – – 12 #5,858
2001 – – 6 #9,735
2000 – – 8 #7,731
1995 – – – –
1990 – – 9 #5,547
1985 – – 7 #5,388
1980 – – 11 #3,712
1975 – – 11 #3,322
1970 – – 16 #2,339
1965 – – 16 #2,030
1960 – – 18 #1,941
1955 – – 30 #1,407
1950 – – 24 #1,516
1945 – – 31 #1,192
1940 – – 33 #1,169
1935 – – 57 #825
1930 – – 60 #849
1925 10 #3,221 141 #513
1920 – – 198 #426
1915 12 #2,462 265 #322
1910 – – 54 #342
1905 – – 21 #499
1900 – – 24 #474
1895 – – 19 #464
1890 – – 14 #522
1885 5 #1,115 10 #622
1880 – – 9 #658

Famous people named Isadore

The most globally famous bearers of the name, ranked by fame across Wikipedia editions (Pantheon project, MIT).

  1. 1 Isadore Singer Isadore Singer American mathematician (1924–2021) Contemporary

Portraits from Wikipedia (Wikimedia Commons).

Frequently asked questions

Quick answers about Isadore, drawn from the same Social Security data as the charts above.

How old is the average Isadore?

The median living Isadore is about 54 years old. Half of all living Isadores are between 23 and 72 years old.

How many people named Isadore are alive today?

An estimated 1,200 people named Isadore are alive in the United States, based on 5,909 recorded births and Social Security life tables.

What does the name Isadore mean?

A non-standard variant of Isidore, possibly inspired by the well-known feminine variant Isadora of Isidora.

How popular is the name Isadore in 2025?

Isadore ranked #5,963 among boys' names in the United States in 2025, with 15 babies given the name, according to Social Security Administration data.

How many people are named Isadore?

5,909 babies have been named Isadore in the United States since 1880, based on Social Security card applications.

When was the name Isadore most popular?

Isadore peaked in 1916, when 285 newborns received the name.

Is Isadore a boy or girl name?

Isadore is overwhelmingly a boy's name: 97% of babies with the name.

Is the name Isadore rising or falling?

Isadore is on the rise, noticeably more popular now than a decade ago.

Who are famous people named Isadore?

Well-known people named Isadore include Isadore Singer (mathematician).

Names like Isadore

Names that sound and feel close to Isadore: shared sounds, similar era, similar popularity. Each links to its full history.

Compare Isadore with similar names → More names starting with I →