How Many People Have the Last Name Hennessy?
people had the surname Hennessy in the 2010 US Census
About 1 in 31,546 people in the Census had this surname
Source: Census Bureau surname list
Surname Rank
Of 162,253 surnames
Per 100,000 People
In 2010
Largest Group
White
Change Since 2000
+151 people
👥 Race and Hispanic Origin
Most people with the surname Hennessy (94.7%) are non-Hispanic White. Among surnames where most people are non-Hispanic White, Hennessy ranks #2,857. The mix barely changed from 2000: no group's share moved by 2 points or more.
📈 Change Since 2000
Hennessy grew from 9,187 people in 2000 to 9,338 in 2010 (up 1.6%), and its rank fell from #3,550 to #3,790. The population grew faster, so its share still fell, from 3.41 to 3.17 people per 100,000.
| 2000 | 2010 | |
|---|---|---|
| People | 9,187 | 9,338 |
| Rank | #3,550 | #3,790 |
| Per 100,000 people | 3.41 | 3.17 |
🏆 Surnames Ranked Near Hennessy
🔊 Surnames That Sound Alike
Same Soundex code as Hennessy: H520
👤 Hennessy as a First Name
Hennessy is a first name too: about 1,616 people alive in the US today have it as a first name, an estimate from Social Security birth records.
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