2000
#144,908
National surname rank
Recorded bearers 105
First available Census row
Per 100,000 0.04
Very Rare Last name
Rosploch
A surname derived from a Scottish place name or a habitational name.
According to the 2020 US Census Bureau surname tables, roughly 119 Americans carry the last name Rosploch. That puts it at #153,590 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,880,289 residents).
This page is the full Name Census profile for the Rosploch 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
119
1 in 2,880,289
Census rank
#153,590
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
104
very rare in the US
Popularity narrative
The Census Bureau recorded 104 bearers of the surname Rosploch in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 153590th position in the national surname ranking.
Among Census respondents with the surname Rosploch, the largest self-reported group is White at 96.2%. The next largest groups are Hispanic (3.8%).
Origin
Meaning and origin of Rosploch
The surname ROSPLOCH has its origins in Poland, dating back to the 14th century. It is believed to have originated from the Polish village of Rospłoch, located in the southern region of the country. The name itself is derived from the Old Polish word "rozpłoch," which means "dispersion" or "scattering."
One of the earliest recorded instances of the name ROSPLOCH can be found in a historical document from the year 1387, which mentions a person named "Jan Rosploch" who resided in the village of the same name. This suggests that the name was already well-established by that time.
During the Middle Ages, the ROSPLOCH surname was primarily associated with the Polish nobility and landed gentry. Several members of the family were knights and military commanders who participated in various wars and conflicts, including the Polish-Teutonic Wars of the 15th century.
In the 16th century, a prominent figure named Jakub ROSPLOCH (1520-1578) rose to prominence as a renowned scholar and philosopher. He was a professor at the Jagiellonian University in Krakow and authored several influential works on logic and metaphysics.
Another notable individual with the ROSPLOCH surname was Tomasz ROSPLOCH (1685-1741), a Polish painter and artist who was known for his religious and historical paintings. His works can be found in several churches and museums throughout Poland.
In the 19th century, a Polish nobleman named Michał ROSPLOCH (1810-1878) played a significant role in the November Uprising against the Russian Empire. He was a military commander and strategist who led several successful battles against the Russian forces.
The ROSPLOCH surname has also been associated with various place names and locations in Poland. For instance, the village of Rospłochowo, located in the Mazovian Voivodeship, is believed to have derived its name from the ROSPLOCH family.
Throughout history, the ROSPLOCH surname has undergone various spelling variations, such as Rospłoch, Rospłochowski, and Rospłochowicz, reflecting regional dialects and linguistic changes over time.
Demographics
Ancestry and ethnicity for Rosploch
Among Census respondents with the surname Rosploch, the largest self-reported group is White at 96.2%. The next largest groups are Hispanic (3.8%).
The bar chart below shows how Rosploch 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 Rosploch surname at the time of the 2020 Census, not any inherent property of the name itself.
- White96.2% · 100
- Hispanic or Latino3.8% · 4
Timeline
Historical Census data for Rosploch
Rosploch 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
#149,395
National surname rank
Recorded bearers 110
+5 bearers (+4.8%)
Per 100,000 0.04
Rank movement Down 4,487 places
2020
#153,590
National surname rank
Recorded bearers 104
-6 bearers (-5.5%)
Per 100,000 0.03
Rank movement Down 4,195 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #144,908 | 105 | 0.04 | First available Census row | First available Census row |
| 2010 | #149,395 | 110 | 0.04 | +5 bearers (+4.8%) | Down 4,487 places |
| 2020 | #153,590 | 104 | 0.03 | -6 bearers (-5.5%) | Down 4,195 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 Rosploch 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 | #149,395 | #153,590 | -2.8% |
| Count | 110 | 104 | -5.5% |
| Per 100K | 0.04 | 0.03 | -13.0% |
Between the 2010 and 2020 Census, the number of Rosploch bearers went from 110 to 104 (-5.5% change). The surname moved down 4,195 positions in the national ranking, going from #149,395 to #153,590.
FAQ
Rosploch surname: questions and answers
How many people in the U.S. have the surname Rosploch?
Name Census estimates that about 119 living Americans carry the surname Rosploch. Using the current population baseline, that works out to roughly 1 in 2,880,289 residents.
How common is Rosploch?
Rosploch ranks #153,590 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 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 104 people with the surname Rosploch. That is different from the site's living-bearer estimate (119), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 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 Rosploch.
Has Rosploch become more or less common over time?
Between 2010 and 2020, the surname Rosploch went from 110 recorded bearers to 104. That is a decrease of 6 (-5.5%). In the national ranking it fell from #149,395 to #153,590.
What does the Census say about the background of Rosploch?
Among Census respondents with the surname Rosploch, the largest self-reported group is White at 96.2%. The next largest groups are Hispanic (3.8%). 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 Rosploch in the 2020 Census, accounting for 96.2% (100 people in the source table).
What is the full ancestry breakdown?
Rosploch appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (96.2%), Hispanic (3.8%). 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 Rosploch (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 Rosploch mean?
A surname derived from a Scottish place name or a habitational name. 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 Rosploch (0.03 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 Americans have the surname Rosploch?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.