Explore the Family Name Riolo

The meaning of Riolo

Italian (southern): 1. habitational name from any of various places called with Riolo or Riola, such as Riolo in Modena, Riolo Terme in Ravenna, and Riola in Bologna, or from a shortened form of Oriolo, the name of a place in Cosenza province. 2. possibly a diminutive of Rio 1. Some characteristic forenames: Italian Angelo, Caesar, Gaetano, Pasquale.

Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.

How common is the last name Riolo in the United States?

Based on the Decennial U.S. Census, the surname Riolo saw a slight dip in popularity between 2000 and 2010. In 2000, it was ranked 33,933, but by 2010, it slipped to 34,574 which equates to a decrease of approximately 1.89%. Despite this drop in rank, the actual count of individuals with the Riolo surname increased from 633 in 2000 to 654 in 2010, a growth of 3.32%. However, when assessing the proportion per 100k people, there was a small decrease of 4.35% from 0.23 to 0.22.

	2000	2010	Change
Rank	#33,933	#34,574	-1.89%
Count	633	654	3.32%
Proportion per 100k	0.23	0.22	-4.35%

Race and Ethnicity of people with the last name Riolo

The ethnicity associated with the surname Riolo also underwent some changes during the same period, according to data from the Decennial U.S. Census. The proportion of those identifying as Asian/Pacific Islander grew by 57.94%, increasing from 1.26% in 2000 to 1.99% in 2010. Those who identified as both White and Hispanic remained the majority, making up 91.74% and 5.20% respectively in 2010 even after slight changes from 2000. The percentage of those identifying as two or more races saw a significant decrease of 56.32%, falling from 1.74% to 0.76%. No data was available for those identifying as Black, American Indian, or Alaskan Native.

	2000	2010	Change
White	92.1%	91.74%	-0.39%
Hispanic	4.27%	5.2%	21.78%
Asian/Pacific Islander	1.26%	1.99%	57.94%
Two or More Races	1.74%	0.76%	-56.32%
Black	0%	0%	0%
American Indian and Alaskan Native	0%	0%	0%