LAST NAME · 2020 CENSUS
Hennessy
Hennessy is the 3,821st most common last name in the United States. In the 2020 Census, 9,053 people carried it — about 3.0 of every 100,000 people. Most people named Hennessy are White.
WHO CARRIES THIS NAME · 2020
White92.1%
Hispanic3.4%
Multiracial3.0%
Asian American0.7%
Black0.6%
Native American0.1%
Shares are tabulated by the US Census Bureau, not modeled. Methodology.
RANK OVER TIME
1990
#5,161
4,974
2000
#3,550
9,187
2010
#3,790
9,338
2020
#3,821
9,053