How rare is the last name Osullivan?

11,971 people in the United States have the last name Osullivan, about 1 in 24,969. It ranks #2,941 of 156,621 last names in the 2020 Census.

last name

OSULLIVAN

#2,941

of 156,621 last names recorded in the 2020 Census

People
11,971
About
1 in 24,969
This common or more
52.3%
Who bears it

Of the 11,971 people with the last name Osullivan, 91.1% reported their origin as White, 3.4% as Hispanic or Latino and 2.8% as two or more races. These count how people described themselves on the 2020 Census, not where the name comes from.

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