Explore the Family Name Janczak
The meaning of Janczak
Polish: patronymic from Janek, a pet form of the personal name Jan. Some characteristic forenames: Polish Casimir, Edyta, Grzegorz, Jerzy, Wojciech, Zygmunt.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Janczak in the United States?
Based on data from the Decennial U.S. Census, the surname Janczak held the rank of 32,900 in popularity in the year 2000, and then slightly decreased to a rank of 33,343 by 2010. This change represented a minor drop of 1.35% over the decade. In terms of count, however, the number of individuals with the Janczak surname increased from 657 in 2000 to 685 in 2010, marking a rise of 4.26%. The proportion per 100k also saw a slight decrease of 4.17%, shifting from 0.24 in 2000 to 0.23 in 2010.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #32,900 | #33,343 | -1.35% |
| Count | 657 | 685 | 4.26% |
| Proportion per 100k | 0.24 | 0.23 | -4.17% |
Race and Ethnicity of people with the last name Janczak
In regards to ethnicity, the Decennial U.S. Census data shows that the majority of those carrying the Janczak surname identified as White, making up 96.96% of this group in 2000 and slightly declining to 95.91% by 2010. A very small percentage of Janczaks identified as Hispanic, increasing from 1.37% in 2000 to 1.90% in 2010. Those identifying with two or more ethnic identities rose from 0.76% to 1.02% over the same period. There were no individuals with the Janczak surname who identified as Asian/Pacific Islander, Black, or American Indian and Alaskan Native in either census year.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 96.96% | 95.91% | -1.08% |
| Hispanic | 1.37% | 1.9% | 38.69% |
| Two or More Races | 0.76% | 1.02% | 34.21% |
| Asian/Pacific Islander | 0% | 0% | 0% |
| Black | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |