Explore the Family Name Koslowsky

The meaning of Koslowsky

1. Germanized or Americanized form Polish Kozłowski (see Kozlowski). 2. Jewish (eastern Ashkenazic): variant of Koslowski. Some characteristic forenames: German Dieter, Kurt. Russian Konstantin, Raisa.

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

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

Based on the Decennial U.S. Census, the surname Koslowsky has seen an increase in popularity between 2000 and 2010. In 2000, Koslowsky ranked as the 71,610th most popular surname in the United States, but by 2010, it had risen to the 69,996th spot. This change represents a 2.25% increase in rank. Additionally, the number of individuals with the Koslowsky surname grew from 254 in 2000 to 280 in 2010, marking a 10.24% rise in count. However, the proportional prevalence per 100k population remained constant at 0.09 during this decade.

	2000	2010	Change
Rank	#71,610	#69,996	2.25%
Count	254	280	10.24%
Proportion per 100k	0.09	0.09	0%

Race and Ethnicity of people with the last name Koslowsky

The Decennial U.S. Census also provides insight into the ethnic identity associated with the Koslowsky surname. In both 2000 and 2010, there were no recorded instances of the surname among the Asian/Pacific Islander, Hispanic, Black, or American Indian and Alaskan Native communities. The majority of individuals with the Koslowsky surname identified as White, though this demographic reduced slightly from 96.46% in 2000 to 92.14% in 2010. Interestingly, those identifying with two or more ethnicities increased, rising from 2.36% in 2000 to 3.57% in 2010—a growth of 51.27%. By 2010, a small percentage (2.14%) of individuals with the Koslowsky surname began to identify as Hispanic.

	2000	2010	Change
White	96.46%	92.14%	-4.48%
Two or More Races	2.36%	3.57%	51.27%
Hispanic	0%	2.14%	0%
Asian/Pacific Islander	0%	0%	0%
Black	0%	0%	0%
American Indian and Alaskan Native	0%	0%	0%