Explore the Family Name Mongan

The meaning of Mongan

Irish (Galway and Mayo): variant of Mangan.

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

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

Based on the Decennial U.S. Census, the popularity of the surname Mongan has seen a slight decline between 2000 and 2010. In 2000, Mongan was ranked as the 28,375th most popular surname, but by 2010 it had slipped to 33,087th place, marking a decrease of approximately 16.61 percent. Similarly, the count of people with this surname dropped from 792 to 692, representing a reduction of about 12.63 percent. Consequently, the proportion of individuals with this surname per 100,000 residents also decreased from 0.29 in 2000 to 0.23 in 2010, which is a 20.69 percent decrease.

	2000	2010	Change
Rank	#28,375	#33,087	-16.61%
Count	792	692	-12.63%
Proportion per 100k	0.29	0.23	-20.69%

Race and Ethnicity of people with the last name Mongan

Regarding the ethnic identity associated with the surname Mongan, according to the Decennial U.S. Census, there were some shifts between 2000 and 2010. The majority of people with this surname identified as White, accounting for 93.94 percent in 2000 and slightly less at 93.50 percent in 2010. There was also an increase in those identifying as Hispanic, rising from 1.26 percent to 2.17 percent over the decade, indicating a growth rate of 72.22 percent. The proportion of people identifying as Black decreased from 2.90 percent to 2.17 percent. Notably, there was a small representation of Asian/Pacific Islanders (1.16 percent) in 2010, which did not exist in 2000. However, data for individuals identifying as two or more races and American Indian and Alaskan Native was either nonexistent or suppressed for privacy.

	2000	2010	Change
White	93.94%	93.5%	-0.47%
Hispanic	1.26%	2.17%	72.22%
Black	2.9%	2.17%	-25.17%
Asian/Pacific Islander	0%	1.16%	0%
Two or More Races	0.76%	0%	0%
American Indian and Alaskan Native	0%	0%	0%