Explore the Family Name Oclair

The meaning of Oclair

Altered form (also O’Clair) of French Auclair. History: Bearers of the surnames Oclair and O’Clair are descendants of one or another of the brothers Pierre and André Auclair from France (see Auclair). Some characteristic forenames: French Armand, Rolande.

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

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

Based on the Decennial U.S. Census, the surname Oclair has seen a rise in popularity between 2000 and 2010. In 2000, it was ranked 41,522, but by 2010, it had risen to rank 39,607—that's a 4.61% increase. The count of people with this surname also surged from 494 in 2000 to 555 in 2010, marking a considerable growth of 12.35%. This means that the proportion of individuals named Oclair per 100,000 people increased by 5.56% during the same period.

	2000	2010	Change
Rank	#41,522	#39,607	4.61%
Count	494	555	12.35%
Proportion per 100k	0.18	0.19	5.56%

Race and Ethnicity of people with the last name Oclair

The ethnicity associated with the Oclair surname has also seen some shifts over the decade, according to data from the Decennial U.S. Census. In 2000, 96.76% of Oclairs identified as White, but this figure dropped slightly to 94.59% by 2010. Simultaneously, there was a notable increase in those identifying with two or more races, up from 1.62% in 2000 to 2.34% in 2010—a change of 44.44%. Interestingly, the percentage of Oclairs identifying as Hispanic appeared for the first time in 2010 at 1.44%. Meanwhile, the percentage of Asian/Pacific Islanders dropped from 1.21% to 0, while the Black and American Indian and Alaskan Native populations remained at 0 throughout the decade.

	2000	2010	Change
White	96.76%	94.59%	-2.24%
Two or More Races	1.62%	2.34%	44.44%
Hispanic	0%	1.44%	0%
Asian/Pacific Islander	1.21%	0%	0%
Black	0%	0%	0%
American Indian and Alaskan Native	0%	0%	0%