Explore the Family Name Kolby
The meaning of Kolby
1. Danish and Norwegian: habitational name from a Danish placename or a Norwegian farm name, a compound of kol (see Kolberg) and Old Norse býr ‘farm’. 2. Americanized form of German Kolbe. Compare Colby. Some characteristic forenames: German Kurt, Maximilian.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Kolby in the United States?
Based on the Decennial U.S. Census data, the popularity of the surname Kolby has seen a slight decline between 2000 and 2010. Ranked at 70,473 in 2000, it dropped to 76,275 in 2010, marking an overall decrease of 8.23%. The number of individuals with this surname also fell from 259 to 252 during the same period, indicating a -2.7% change. The proportion of people named Kolby per 100k population decreased by 10.0%, moving from 0.1 to 0.09.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #70,473 | #76,275 | -8.23% |
| Count | 259 | 252 | -2.7% |
| Proportion per 100k | 0.1 | 0.09 | -10% |
Race and Ethnicity of people with the last name Kolby
When looking at the ethnicity associated with the surname Kolby, again based on the Decennial U.S. Census data, there have been some shifts over a decade. The majority of individuals identified as White, although this percentage decreased from 93.82% in 2000 to 90.87% in 2010. The percentage of individuals identifying as two or more ethnicities increased slightly from 3.47% in 2000 to 3.57% in 2010. In 2010, for the first time, a small proportion (2.78%) identified as Black. No individuals with the surname Kolby identified as Asian/Pacific Islander, Hispanic, or American Indian and Alaskan Native in either 2000 or 2010.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 93.82% | 90.87% | -3.14% |
| Two or More Races | 3.47% | 3.57% | 2.88% |
| Black | 0% | 2.78% | 0% |
| Asian/Pacific Islander | 0% | 0% | 0% |
| Hispanic | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |