Explore the Family Name Costilow
The meaning of Costilow
Irish: probably a variant of Costello.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Costilow in the United States?
Based on the Decennial U.S. Census data, the popularity of the surname Costilow has seen a decrease over time. In 2000, the surname ranked 46,000 with a total count of 437 individuals. By 2010, the rank had fallen to 51,281 with a total count of 406 persons bearing the surname. This represents an overall decrease in popularity of 11.48% and a reduction of 7.09% in the total count of people with this surname. The proportion per 100,000 people also decreased from 0.16 in 2000 to 0.14 in 2010, a drop of 12.5%.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #46,000 | #51,281 | -11.48% |
| Count | 437 | 406 | -7.09% |
| Proportion per 100k | 0.16 | 0.14 | -12.5% |
Race and Ethnicity of people with the last name Costilow
Regarding the ethnic identity associated with the surname Costilow, the Decennial U.S. Census data shows that it is predominantly tied to white ethnicity. In 2000, approximately 94.05% of those with the surname identified as white, which slightly decreased to 93.60% in 2010. Over the same period, the percentage of individuals identifying as Hispanic rose from 2.52% to 3.94%, a notable increase of 56.35%. The number of persons identifying as having two or more ethnicities also saw a rise from 1.83% to 2.22%. There was no recorded data for Asian/Pacific Islander or Black ethnic identities, and the percentage of American Indian and Alaskan Native fell from 1.37% to 0.00%.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 94.05% | 93.6% | -0.48% |
| Hispanic | 2.52% | 3.94% | 56.35% |
| Two or More Races | 1.83% | 2.22% | 21.31% |
| Asian/Pacific Islander | 0% | 0% | 0% |
| Black | 0% | 0% | 0% |
| American Indian and Alaskan Native | 1.37% | 0% | -100% |