2010
#159,712
National surname rank
Recorded bearers 101
First available Census row
Per 100,000 0.03
Very Rare Last name
Kozachenko
A Ukrainian surname derived from the word "kozak" meaning Cossack or horseman.
According to the 2020 US Census Bureau surname tables, roughly 136 Americans carry the last name Kozachenko. That puts it at #142,788 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,520,252 residents).
This page is the full Name Census profile for the Kozachenko surname. You will find the Census Bureau frequency data, a multi-census history view, an ancestry and ethnicity breakdown based on self-reported demographics, the name's meaning and origin where available, and answers to the most common questions people ask about this surname.
Bearers in the US
136
1 in 2,520,252
Census rank
#142,788
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
119
very rare in the US
Popularity narrative
The Census Bureau recorded 119 bearers of the surname Kozachenko in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 142788th position in the national surname ranking.
Among Census respondents with the surname Kozachenko, the largest self-reported group is White at 91.6%. The next largest groups are Hispanic (7.6%) and Asian/Pacific Islander (0.8%).
Origin
Meaning and origin of Kozachenko
The surname Kozachenko has its origins in Ukraine and can be traced back to the 16th century. It is derived from the Ukrainian word "kozak," which refers to the Cossacks, a group of semi-nomadic people who inhabited the steppes of Ukraine and southern Russia.
The Cossacks were known for their military prowess and played a significant role in the history of the region. The name Kozachenko likely emerged as a patronymic, indicating that the bearer was the son or descendant of a Cossack.
One of the earliest recorded mentions of the name Kozachenko can be found in the Cossack registers of the Zaporozhian Sich, a self-governing Cossack republic located on the islands of the Dnieper River. These registers, dating back to the 17th century, were instrumental in documenting the names of Cossacks and their descendants.
Notable individuals with the surname Kozachenko include Petro Kozachenko (1857-1934), a Ukrainian writer and poet who was a prominent figure in the cultural revival movement of the late 19th century. Another notable figure was Hryhoriy Kozachenko (1886-1948), a Ukrainian composer and conductor who made significant contributions to the development of Ukrainian classical music.
In the 18th century, the name Kozachenko can be found in the records of the Kuban Cossack Host, a Cossack community that settled in the Kuban region of southern Russia. One prominent member of this community was Ivan Kozachenko (1725-1801), a Cossack leader and military commander who played a crucial role in the Russian Empire's expansion into the Caucasus region.
The name Kozachenko has also been associated with several place names in Ukraine, such as the village of Kozachanka in the Kharkiv region and the town of Kozachyn in the Cherkasy region. These place names likely originated from the presence of Cossack settlements in those areas.
Another notable figure with the surname Kozachenko was Oleksiy Kozachenko (1901-1977), a Soviet military officer who served in World War II and was awarded the prestigious title of Hero of the Soviet Union for his bravery and leadership on the battlefield.
Overall, the surname Kozachenko has a rich history deeply intertwined with the Cossack culture and the turbulent past of Ukraine and southern Russia. It serves as a testament to the enduring legacy of this unique group of people and their significant impact on the region's history and cultural identity.
Demographics
Ancestry and ethnicity for Kozachenko
Among Census respondents with the surname Kozachenko, the largest self-reported group is White at 91.6%. The next largest groups are Hispanic (7.6%) and Asian/Pacific Islander (0.8%).
The bar chart below shows how Kozachenko bearers described their own race and ethnicity on the 2020 Census form. The Census Bureau groups responses into six broad categories: White, Black or African American, Hispanic or Latino, Asian and Pacific Islander, American Indian and Alaska Native, and Two or More Races. When a category has too few respondents for a given surname, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown for every Census year so the breakdown stays comparable over time. When the source file also includes raw headcounts, Name Census shows those alongside the percentages in the legend.
Keep in mind that these are self-reported numbers. A person's surname does not determine their race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the Kozachenko surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.6% · 109
- Hispanic or Latino7.6% · 9
- Asian and Pacific Islander0.8% · 1
Timeline
Historical Census data for Kozachenko
Kozachenko appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#142,788
National surname rank
Recorded bearers 119
+18 bearers (+17.8%)
Per 100,000 0.04
Rank movement Up 16,924 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #159,712 | 101 | 0.03 | First available Census row | First available Census row |
| 2020 | #142,788 | 119 | 0.04 | +18 bearers (+17.8%) | Up 16,924 places |
For 2020, the Census Bureau published race and Hispanic-origin columns as counts rather than percentages. Name Census converts those counts back into shares so the ancestry section stays comparable with the older surname files.
Year on year
2010 vs 2020 Census
How has the Kozachenko surname changed between Census years? The chart shows bearer count side by side, and the table compares rank, count, and frequency.
Census year comparison
20102020
| Metric | 2010 | 2020 | Change |
|---|---|---|---|
| Rank | #159,712 | #142,788 | 10.6% |
| Count | 101 | 119 | 17.8% |
| Per 100K | 0.03 | 0.04 | 32.7% |
Between the 2010 and 2020 Census, the number of Kozachenko bearers went from 101 to 119 (+17.8% change). The surname moved up 16,924 positions in the national ranking, going from #159,712 to #142,788.
FAQ
Kozachenko surname: questions and answers
How many people in the U.S. have the surname Kozachenko?
Name Census estimates that about 136 living Americans carry the surname Kozachenko. Using the current population baseline, that works out to roughly 1 in 2,520,252 residents.
How common is Kozachenko?
Kozachenko ranks #142,788 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.04 per 100,000 residents, which is about 0 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 119 people with the surname Kozachenko. That is different from the site's living-bearer estimate (136), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.04 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.04 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 0 of them to have the surname Kozachenko.
Has Kozachenko become more or less common over time?
Between 2010 and 2020, the surname Kozachenko went from 101 recorded bearers to 119. That is an increase of 18 (+17.8%). In the national ranking it rose from #159,712 to #142,788.
What does the Census say about the background of Kozachenko?
Among Census respondents with the surname Kozachenko, the largest self-reported group is White at 91.6%. The next largest groups are Hispanic (7.6%) and Asian/Pacific Islander (0.8%). These figures come from the 2020 Census Bureau surname tables, based on how respondents described their own race and ethnicity.
Which group reports this surname most often?
White is the largest self-reported group for the surname Kozachenko in the 2020 Census, accounting for 91.6% (109 people in the source table).
What is the full ancestry breakdown?
Kozachenko appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.6%), Hispanic (7.6%), Asian/Pacific Islander (0.8%). For 2020, the source file also published raw headcounts for each group, which is why this page can show both percentages and counts in the ancestry section.
Is this page using the latest Census data?
Yes. This page is using the latest surname file currently loaded on Name Census, which is 2020. The historical section above also keeps any older Census surname entries we have for Kozachenko (2010, 2020).
Does the Census include every surname?
No. The Census Bureau only publishes surnames that appeared at least 100 times in a given decennial Census. That means very rare surnames are excluded entirely, and a surname can appear in one Census release but disappear from a later one if it falls below the reporting threshold.
Why don't the ancestry percentages always add up to exactly 100%?
There are two main reasons: rounding and suppression. The Census Bureau rounds published values, and it may suppress very small cells to protect privacy. For 2020, the Bureau also published raw group counts rather than direct percentages, so Name Census converts those counts back into shares for comparability across census years.
What does Kozachenko mean?
A Ukrainian surname derived from the word "kozak" meaning Cossack or horseman. The fuller origin note on this page goes into more detail.
Where does the surname data come from?
All surname statistics on Name Census are drawn from the US Census Bureau's decennial surname frequency tables. These files list every surname that appeared 100 or more times in the 2020 Census, along with a count, a per-100,000 rate, and a self-reported demographic breakdown. You can read the full explanation on our methodology page.
How does Name Census estimate living bearers?
For surnames, Name Census does not age cohorts the way it does for first names. Instead, it takes the Census Bureau's published frequency for Kozachenko (0.04 per 100,000) and applies that rate to the current U.S. resident population to estimate how many living Americans have the surname today.
How many people have the last name Kozachenko?
See how many Americans have the surname Kozachenko on HowManyOfMe.org, our sister site built around that single question.