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