Explore the Family Name Lacosse
The meaning of Lacosse
1. Altered form of French Canadian Lacasse, itself an altered form, with fused feminine definite article la, of French Cassé (see Casse 1). 2. In some cases possibly also French: variant, with fused feminine definite article la, of Cosse 3 ‘pod’.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Lacosse in the United States?
Based on the Decennial U.S. Census data, the popularity of the surname Lacosse has seen a considerable decrease between 2000 and 2010. In 2000, the surname was ranked 37,266th in terms of popularity in the United States, but by 2010 it had fallen to 44,808th, marking a drop of over 20 percent. The count of people carrying the surname also declined during this period, from 563 to 479, which represents a decrease of nearly 15 percent. Additionally, the proportion of people with this surname per 100,000 individuals dropped by almost 24 percent, from 0.21 to 0.16.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #37,266 | #44,808 | -20.24% |
| Count | 563 | 479 | -14.92% |
| Proportion per 100k | 0.21 | 0.16 | -23.81% |
Race and Ethnicity of people with the last name Lacosse
In terms of ethnicity, the Decennial U.S. Census data highlights a few shifts within the population bearing the surname Lacosse. The percentage of individuals identified as White slightly decreased from 93.25 percent in 2000 to 92.90 percent in 2010. At the same time, the Hispanic representation within the Lacosse surname group saw an increase of over 52 percent, moving from 1.78 percent to 2.71 percent. Those identifying as two or more races also rose significantly, from 1.24 percent to 2.09 percent, reflecting a change of 68.55 percent. However, in the 2010 Census, no individuals with the surname Lacosse identified as Black or Asian/Pacific Islander. Interestingly, in 2010, 1.04% identified as American Indian and Alaskan Native, a category that was unrepresented in 2000.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 93.25% | 92.9% | -0.38% |
| Hispanic | 1.78% | 2.71% | 52.25% |
| Two or More Races | 1.24% | 2.09% | 68.55% |
| American Indian and Alaskan Native | 0% | 1.04% | 0% |
| Asian/Pacific Islander | 0% | 0% | 0% |
| Black | 2.66% | 0% | 0% |