first name
GILLIAN
of 53,615 first names recorded in the 2020 Census
Of the 19,505 people named Gillian, 78.9% reported their origin as White, 7.1% as Black and 6.2% as Hispanic or Latino. 99% are female. These count how people described themselves on the 2020 Census, not where the name comes from.
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Gillian peaked in 1999, when 1,030 babies got the name.
At least 16,127 babies have been given the name since 1922. 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.
Gillian by decade
Among all names given to American babies, its best decade was the 2000s, when it ranked #1,003. The largest share of babies named Gillian, 53.6%, were born between 1997 and 2012, as Generation Z.
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 Gillian is most common
Compared with all babies born in each state since 1910, Gillian has been most common in Connecticut (2.3×), New Jersey (2.1×), and Massachusetts (2×), and least common in Alabama (0.19×).
12,749 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 Gillian
Spelled almost the same
6 first names in the 2020 Census spelled within a letter or two of Gillian, most common first.
Also a last name
As a last name, Gillian ranks #18,787 of 156,621, with 1,449 people. See Gillian as a last name
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🔎 GILLIAN 🟦🟦🟦🟦🟦🟦🟦🟦⬜⬜ 1 in 15,485 Americans Rarer than 76% of us Peaked in 1999 with 1,030 babies Beat that 👇 https://howrareismy.name/first/gillian/