Explore the Family Name Castles

The meaning of Castles

1. English: variant of Castle, with post-medieval excrescent -s. 2. Irish (Armagh and Meath): in Ireland, this may be the English name, but it may also be an Anglicized form of Ó Caisil; see Cashell.

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

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

Based on the Decennial U.S. Census data, the surname Castles saw a slight decrease in popularity between 2000 and 2010. In 2000, the surname was ranked 27,526th in terms of popularity, but by 2010, it dropped slightly to 27,950th. This reflects a 1.54% drop. However, the number of people who carry this surname actually increased from 824 in 2000 to 858 in 2010, marking a 4.13% rise. The proportion of individuals with the Castles surname per 100k people also decreased by 6.45%.

	2000	2010	Change
Rank	#27,526	#27,950	-1.54%
Count	824	858	4.13%
Proportion per 100k	0.31	0.29	-6.45%

Race and Ethnicity of people with the last name Castles

The ethnicity associated with the surname Castles also witnessed changes according to the Decennial U.S. Census. A significant majority of those carrying the Castles surname identify as White, though the percentage slightly decreased from 95.02% in 2000 to 93.82% in 2010. Those identifying as Hispanic made the most notable change, nearly doubling from 1.94% in 2000 to 3.73% in 2010. The proportion of people who identified with two or more races and as Black both experienced decreases of 24.77% and 14.68% respectively. There were no recorded individuals of Asian/Pacific Islander or American Indian and Alaskan Native descent with the Castles surname in either year.

	2000	2010	Change
White	95.02%	93.82%	-1.26%
Hispanic	1.94%	3.73%	92.27%
Black	1.09%	0.93%	-14.68%
Two or More Races	1.09%	0.82%	-24.77%
Asian/Pacific Islander	0%	0%	0%
American Indian and Alaskan Native	0%	0%	0%