2000
#148,244
National surname rank
Recorded bearers 102
First available Census row
Per 100,000 0.04
Very Rare Last name
Koniecki
A Polish locational surname denoting someone from a place named Koniecko.
According to the 2020 US Census Bureau surname tables, roughly 126 Americans carry the last name Koniecki. That puts it at #149,446 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,720,273 residents).
This page is the full Name Census profile for the Koniecki 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
126
1 in 2,720,273
Census rank
#149,446
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
110
very rare in the US
Popularity narrative
The Census Bureau recorded 110 bearers of the surname Koniecki in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 149446th position in the national surname ranking.
Among Census respondents with the surname Koniecki, the largest self-reported group is White at 93.6%. The next largest groups are Hispanic (2.7%) and Black (1.8%).
Origin
Meaning and origin of Koniecki
The surname Koniecki is of Polish origin, derived from the word "konik" meaning "little horse" or "pony". It likely originated in the late medieval period, possibly as an occupational surname for someone who worked with horses or as a descriptive name referring to a person's physical appearance or temperament.
One of the earliest recorded instances of the Koniecki surname can be found in the Akta Grodzkie i Ziemskie, a collection of medieval legal documents from the Crown of the Polish Kingdom, dating back to the 15th century. The name appears to have been prevalent in the regions of Lesser Poland and Masovia.
In the 16th century, there were several notable individuals bearing the Koniecki surname. Jan Koniecki (c. 1500-1570) was a Polish writer and translator who worked on translations of classical works into Polish. Another Jan Koniecki (c. 1530-1590) was a Polish nobleman and landowner who held positions in the court of King Sigismund III Vasa.
The 17th century saw the rise of Marcin Koniecki (1610-1680), a Polish military commander who fought in the Polish-Swedish War and the Polish-Cossack Wars. He was known for his tactical skills and bravery on the battlefield.
In the 18th century, Michał Koniecki (1720-1790) was a Polish landowner and philanthropist who established several schools and hospitals in his estates. He is remembered for his contributions to education and social welfare.
One of the most famous bearers of the Koniecki surname was Józef Koniecki (1840-1915), a Polish engineer and inventor who pioneered the use of reinforced concrete in construction. His innovative techniques were widely adopted and influenced the development of modern civil engineering.
The Koniecki surname has also been found in historical records from other parts of Europe, such as Germany and Ukraine, indicating that families with this name may have migrated or had roots in these regions as well.
Demographics
Ancestry and ethnicity for Koniecki
Among Census respondents with the surname Koniecki, the largest self-reported group is White at 93.6%. The next largest groups are Hispanic (2.7%) and Black (1.8%).
The bar chart below shows how Koniecki 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 Koniecki surname at the time of the 2020 Census, not any inherent property of the name itself.
- White93.6% · 103
- Hispanic or Latino2.7% · 3
- Black or African American1.8% · 2
- Two or more races1.8% · 2
Timeline
Historical Census data for Koniecki
Koniecki appears in 3 published Census surname files: 2000, 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2010
#144,141
National surname rank
Recorded bearers 115
+13 bearers (+12.7%)
Per 100,000 0.04
Rank movement Up 4,103 places
2020
#149,446
National surname rank
Recorded bearers 110
-5 bearers (-4.3%)
Per 100,000 0.04
Rank movement Down 5,305 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #148,244 | 102 | 0.04 | First available Census row | First available Census row |
| 2010 | #144,141 | 115 | 0.04 | +13 bearers (+12.7%) | Up 4,103 places |
| 2020 | #149,446 | 110 | 0.04 | -5 bearers (-4.3%) | Down 5,305 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 Koniecki 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 | #144,141 | #149,446 | -3.7% |
| Count | 115 | 110 | -4.3% |
| Per 100K | 0.04 | 0.04 | -8.0% |
Between the 2010 and 2020 Census, the number of Koniecki bearers went from 115 to 110 (-4.3% change). The surname moved down 5,305 positions in the national ranking, going from #144,141 to #149,446.
FAQ
Koniecki surname: questions and answers
How many people in the U.S. have the surname Koniecki?
Name Census estimates that about 126 living Americans carry the surname Koniecki. Using the current population baseline, that works out to roughly 1 in 2,720,273 residents.
How common is Koniecki?
Koniecki ranks #149,446 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 110 people with the surname Koniecki. That is different from the site's living-bearer estimate (126), 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 Koniecki.
Has Koniecki become more or less common over time?
Between 2010 and 2020, the surname Koniecki went from 115 recorded bearers to 110. That is a decrease of 5 (-4.3%). In the national ranking it fell from #144,141 to #149,446.
What does the Census say about the background of Koniecki?
Among Census respondents with the surname Koniecki, the largest self-reported group is White at 93.6%. The next largest groups are Hispanic (2.7%) and Black (1.8%). 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 Koniecki in the 2020 Census, accounting for 93.6% (103 people in the source table).
What is the full ancestry breakdown?
Koniecki appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (93.6%), Hispanic (2.7%), Black (1.8%). 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 Koniecki (2000, 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 Koniecki mean?
A Polish locational surname denoting someone from a place named Koniecko. 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 Koniecki (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 are called Koniecki?
For a quick modern take, check how many Americans have the surname Koniecki on our sister site HowManyOfMe.org.