LAST NAME · 2020 CENSUS
Riordan
Riordan is the 4,565th most common last name in the United States. In the 2020 Census, 7,544 people carried it — about 2.5 of every 100,000 people. Most people named Riordan are White.
WHO CARRIES THIS NAME · 2020
White92.2%
Hispanic3.3%
Multiracial2.9%
Asian American1.0%
Black0.5%
Native American0.1%
Shares are tabulated by the US Census Bureau, not modeled. Methodology.
RANK OVER TIME
1990
#5,114
4,974
2000
#4,433
7,394
2010
#4,515
7,848
2020
#4,565
7,544