How rare is the name Kolby?

10,460 people in the United States have the first name Kolby, about 1 in 28,875. It ranks #2,393 of 53,615 first names in the 2020 Census.

first name

KOLBY

#2,393

of 53,615 first names recorded in the 2020 Census

People
10,460
About
1 in 28,875
This common or more
79.6%
Who bears it

Of the 10,460 people named Kolby, 79.1% reported their origin as White, 8.2% as Black and 5.6% as two or more races. 89.8% are male. These count how people described themselves on the 2020 Census, not where the name comes from.

Kolby peaked in 2001, when 781 babies got the name.

Births per year, SSA records 1880–2025
19682025
Peak year
2001
Births that year
781
In 2025*
207 ▼73%
Recorded as
almost entirely male

At least 13,001 babies have been given the name since 1968. 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.

Kolby by decade

Among all names given to American babies, its best decade was the 2000s, when it ranked #1,081. The largest share of babies named Kolby, 55.8%, were born between 1997 and 2012, as Generation Z.

1960s#17,2535
1970s#5,997167
1980s#2,406843
1990s#1,3462,870
2000s#1,0815,054
2010s#1,7162,893
2020s#2,2751,169
Generation X 1965–801.6%
Millennials 1981–9619.4%
Generation Z 1997–1255.8%
2013 and later23.2%

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 Kolby is most common

Compared with all babies born in each state since 1910, Kolby has been most common in Utah (5.8×), Idaho (4.4×), and Oklahoma (3×), and least common in Wisconsin (0.25×).

9,365 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 Kolby

#2,391 Samson · 10,470#2,392 Soledad · 10,465#2,394 Atticus · 10,453#2,395 Lesa · 10,440

Spelled almost the same

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

#9,601 Kolbe · 1,437#13,617 Kolbi · 882#31,475 Kolbey · 272

Also a last name

As a last name, Kolby ranks #90,519 of 156,621, with 219 people. See Kolby as a last name

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