Explore the Family Name Diffee

The meaning of Diffee

English: variant of Diffey. Compare Defee. History: William Diffee, from whom present-day American bearers of this name are descended, was born c.1710, probably in Ireland, and died in 1790 in Randolph County, NC. His surname was also spelled Diffey, while his descendants also bear the surname Defee.

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

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

The surname Diffee, according to data based on the Decennial U.S. Census, has shown a slight decrease in popularity from 2000 to 2010. In 2000, it ranked 39,560 in the United States and dropped to a rank of 42,030 in 2010, indicating a -6.24% change. The count of individuals with this surname also decreased marginally from 523 to 517 during the same period, reflecting a -1.15% change. The proportion of people named Diffee per 100,000 population also fell by -5.26%, going from 0.19 in 2000 to 0.18 in 2010.

20002010Change
Rank#39,560#42,030-6.24%
Count523517-1.15%
Proportion per 100k0.190.18-5.26%

Race and Ethnicity of people with the last name Diffee

On the matter of ethnicity, data collected from the Decennial U.S. Census shows that the majority of individuals with the surname Diffee identified as White, with a minor decline from 93.69% in 2000 to 93.04% in 2010. In contrast, the percentage of those identifying as American Indian and Alaskan Native saw an increase from 3.06% to 3.48%. Notably, more individuals reported being of two or more races in 2010 (1.35%) when such data was suppressed in 2000 for privacy. An interesting shift was observed in the Hispanic demographic, which fell by nearly half, from 2.49% in 2000 to 1.35% in 2010. No individuals reported themselves as Asian/Pacific Islander or Black in either census year.

20002010Change
White93.69%93.04%-0.69%
American Indian and Alaskan Native3.06%3.48%13.73%
Two or More Races0%1.35%0%
Hispanic2.49%1.35%-45.78%
Asian/Pacific Islander0%0%0%
Black0%0%0%