LAST NAME · 2020 CENSUS
Grennan
Grennan is the 25,786th most common last name in the United States. In the 2020 Census, 1,001 people carried it — about 0.3 of every 100,000 people. Most people named Grennan are White.
WHO CARRIES THIS NAME · 2020
White91.5%
Multiracial4.1%
Hispanic2.1%
Black1.1%
Asian American1.1%
Native American0.1%
Shares are tabulated by the US Census Bureau, not modeled. Methodology.
RANK OVER TIME
1990
#24,632
0
2000
#25,825
895
2010
#28,049
854
2020
#25,786
1,001