How rare is the name Killian?

10,658 people in the United States have the first name Killian, about 1 in 28,338. It ranks #2,360 of 53,615 first names in the 2020 Census.

first name

KILLIAN

#2,360

of 53,615 first names recorded in the 2020 Census

People
10,658
About
1 in 28,338
This common or more
79.5%
Who bears it

Of the 10,658 people named Killian, 79% reported their origin as White, 10.9% as Hispanic or Latino and 7.3% as two or more races. 94.9% are male. These count how people described themselves on the 2020 Census, not where the name comes from.

Killian peaked in 2017, when 1,528 babies got the name.

Births per year, SSA records 1880–2025
19152025
Peak year
2017
Births that year
1,528
In 2025*
785 ▼49%
Recorded as
almost entirely male

At least 16,834 babies have been given the name since 1915. Years SSA withheld, because fewer than 5 were born, are skipped rather than drawn as zero. * 2025 is the newest year published and it undercounts: a card application is filed some time after a birth.

Killian by decade

Among all names given to American babies, its best decade was the 2020s, when it ranked #719. The largest share of babies named Killian, 74.4%, were born in 2013 or later.

1910s#11,6155
1920s#13,8275
1980s#7,384160
1990s#2,3071,258
2000s#2,0731,971
2010s#7788,062
2020s#7195,373
Greatest Generation 1901–270.1%
Millennials 1981–965.7%
Generation Z 1997–1219.8%
2013 and later74.4%

Rank counts both sexes together, among every name SSA recorded that decade; the number under it is births. The 2020s run only to 2025. Generation years follow Pew Research Center, which has not named a generation after 2012.

Where Killian is most common

Compared with all babies born in each state since 1910, Killian has been most common in Alaska (4.4×), Nevada (2.5×), and Arizona (2.4×), and least common in Mississippi (0.31×).

14,393 births recorded by state, 1910–2025. 2× means twice as common as nationally. States with fewer than 30 such births are left blank, and SSA withholds any year with fewer than 5 in a state, so small states read low.

Either side of Killian

#2,358 Cornelia · 10,664#2,359 Thiago · 10,663#2,361 Rayna · 10,648#2,362 Cherry · 10,641

Spelled almost the same

4 first names in the 2020 Census spelled within a letter or two of Killian, most common first.

#8,455 Kilian · 1,715#46,195 Kielan · 145#47,349 Kilan · 138#50,823 Killeen · 117

Also a last name

As a last name, Killian ranks #3,029 of 156,621, with 11,577 people. See Killian as a last name

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