2010
#159,712
National surname rank
Recorded bearers 101
First available Census row
Per 100,000 0.03
Very Rare Last name
Jachowicz
A Polish surname derived from a personal name meaning "son of Jakub" or "son of Jacob".
According to the 2020 US Census Bureau surname tables, roughly 122 Americans carry the last name Jachowicz. That puts it at #152,339 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,809,462 residents).
This page is the full Name Census profile for the Jachowicz 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
122
1 in 2,809,462
Census rank
#152,339
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
106
very rare in the US
Popularity narrative
The Census Bureau recorded 106 bearers of the surname Jachowicz in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 152339th position in the national surname ranking.
Among Census respondents with the surname Jachowicz, the largest self-reported group is White at 96.2%. The next largest groups are Two or More Races (1.9%) and Black (0.9%).
Origin
Meaning and origin of Jachowicz
The surname Jachowicz originates from Poland, where it first emerged in the late medieval period. It is a Polish habitational name, derived from the placename Jachowice or Jachowo, small villages located in various regions of the country. These placenames are likely derived from the Old Polish personal name "Jach" or "Jacha," which itself may have originated from the Greek name "Joachim."
One of the earliest recorded references to the Jachowicz name can be found in the Akta Grodzkie i Ziemskie (Records of Land and Territorial Courts) from the 15th century, which documented legal proceedings and property transactions across various Polish regions. These records mention individuals with the surname Jachowicz residing in areas such as Kraków and Sandomierz.
During the 16th and 17th centuries, the Jachowicz name appeared in various church records and parish registers, indicating the name's presence among the Polish nobility and gentry. Notably, Stanisław Jachowicz (1505-1578) was a prominent Polish noble and politician who served as the Castellan of Przemyśl and played an active role in the Polish-Lithuanian Commonwealth.
In the 18th century, the Jachowicz surname was associated with several notable figures, including Kazimierz Jachowicz (1725-1802), a Polish landowner and military officer who fought in the Kościuszko Uprising against the Russian Empire. Józef Jachowicz (1767-1828) was a Polish painter and engraver known for his portraiture and religious works.
As the Polish population dispersed across Europe and beyond in the 19th and early 20th centuries, the Jachowicz name traveled with them. One notable bearer was Józef Jachowicz (1856-1919), a Polish-American businessman and community leader who founded the Polish National Alliance, a fraternal organization that played a significant role in preserving Polish culture and identity among Polish immigrants in the United States.
Other notable individuals with the Jachowicz surname include Tadeusz Jachowicz (1892-1954), a Polish sculptor and medalist, and Jerzy Jachowicz (1925-1989), a Polish film director and screenwriter who made significant contributions to the Polish School of Cinema.
While the Jachowicz surname may have evolved over time through various spelling variations and regional adaptations, it remains firmly rooted in its Polish origins, reflecting the rich history and cultural heritage of the Polish people.
Demographics
Ancestry and ethnicity for Jachowicz
Among Census respondents with the surname Jachowicz, the largest self-reported group is White at 96.2%. The next largest groups are Two or More Races (1.9%) and Black (0.9%).
The bar chart below shows how Jachowicz 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 Jachowicz surname at the time of the 2020 Census, not any inherent property of the name itself.
- White96.2% · 102
- Two or more races1.9% · 2
- Black or African American0.9% · 1
- Asian and Pacific Islander0.9% · 1
Timeline
Historical Census data for Jachowicz
Jachowicz 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
#152,339
National surname rank
Recorded bearers 106
+5 bearers (+5.0%)
Per 100,000 0.04
Rank movement Up 7,373 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 | #152,339 | 106 | 0.04 | +5 bearers (+5.0%) | Up 7,373 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 Jachowicz 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 | #152,339 | 4.6% |
| Count | 101 | 106 | 5.0% |
| Per 100K | 0.03 | 0.04 | 18.2% |
Between the 2010 and 2020 Census, the number of Jachowicz bearers went from 101 to 106 (+5.0% change). The surname moved up 7,373 positions in the national ranking, going from #159,712 to #152,339.
FAQ
Jachowicz surname: questions and answers
How many people in the U.S. have the surname Jachowicz?
Name Census estimates that about 122 living Americans carry the surname Jachowicz. Using the current population baseline, that works out to roughly 1 in 2,809,462 residents.
How common is Jachowicz?
Jachowicz ranks #152,339 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 106 people with the surname Jachowicz. That is different from the site's living-bearer estimate (122), 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 Jachowicz.
Has Jachowicz become more or less common over time?
Between 2010 and 2020, the surname Jachowicz went from 101 recorded bearers to 106. That is an increase of 5 (+5.0%). In the national ranking it rose from #159,712 to #152,339.
What does the Census say about the background of Jachowicz?
Among Census respondents with the surname Jachowicz, the largest self-reported group is White at 96.2%. The next largest groups are Two or More Races (1.9%) and Black (0.9%). 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 Jachowicz in the 2020 Census, accounting for 96.2% (102 people in the source table).
What is the full ancestry breakdown?
Jachowicz appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (96.2%), Two or More Races (1.9%), Black (0.9%). 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 Jachowicz (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 Jachowicz mean?
A Polish surname derived from a personal name meaning "son of Jakub" or "son of Jacob". 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 Jachowicz (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 surname Jachowicz?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.