2010
#156,044
National surname rank
Recorded bearers 104
First available Census row
Per 100,000 0.04
Very Rare Last name
Loucka
A surname derived from a Czech place name or meaning "meadow" or "pasture."
According to the 2020 US Census Bureau surname tables, roughly 116 Americans carry the last name Loucka. That puts it at #155,270 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,954,779 residents).
This page is the full Name Census profile for the Loucka 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
116
1 in 2,954,779
Census rank
#155,270
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
101
very rare in the US
Popularity narrative
The Census Bureau recorded 101 bearers of the surname Loucka in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 155270th position in the national surname ranking.
Among Census respondents with the surname Loucka, the largest self-reported group is White at 91.1%. The next largest groups are Hispanic (5.9%) and Black (2.0%).
Origin
Meaning and origin of Loucka
The surname Loucka has its origins in the Czech Republic, dating back to the 12th century. It is derived from the Old Czech word "louka," which means "meadow" or "pasture." This suggests that the name was initially associated with individuals who lived near or worked on meadows or pastures.
Historically, the name Loucka can be found in various old records and manuscripts from the Czech lands. One of the earliest known references to this surname is in a document from the city of Prague, dated 1324, which mentions a person named Jan Loucka.
In the 15th century, a notable individual bearing the Loucka surname was Jan Loucka (c. 1420-1490), a Czech scholar and philosopher who taught at the University of Prague. He was known for his works on logic and metaphysics.
Another significant figure with this surname was Vaclav Loucka (1570-1638), a Czech composer and organist who served at the Church of St. James in Prague. He was renowned for his compositions of sacred music during the Renaissance period.
In the 18th century, there was a prominent Czech painter named Josef Loucka (1725-1788) who was known for his religious and historical paintings. Many of his works can be found in churches and museums across the Czech Republic.
One of the earliest recorded examples of the Loucka surname in its current spelling can be found in a document from the village of Louky, located in the region of Moravia, dated 1632. This document mentions a family with the name Loucka, suggesting a possible connection between the surname and the place name Louky, which means "meadows" in Czech.
Another notable individual with the Loucka surname was Karel Loucka (1885-1960), a Czech linguist and philologist who made significant contributions to the study of Slavic languages. He served as a professor at Charles University in Prague and published numerous works on Czech and Slavic linguistics.
Demographics
Ancestry and ethnicity for Loucka
Among Census respondents with the surname Loucka, the largest self-reported group is White at 91.1%. The next largest groups are Hispanic (5.9%) and Black (2.0%).
The bar chart below shows how Loucka 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 Loucka surname at the time of the 2020 Census, not any inherent property of the name itself.
- White91.1% · 92
- Hispanic or Latino5.9% · 6
- Black or African American2.0% · 2
- Two or more races1.0% · 1
Timeline
Historical Census data for Loucka
Loucka 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
#155,270
National surname rank
Recorded bearers 101
-3 bearers (-2.9%)
Per 100,000 0.03
Rank movement Up 774 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #156,044 | 104 | 0.04 | First available Census row | First available Census row |
| 2020 | #155,270 | 101 | 0.03 | -3 bearers (-2.9%) | Up 774 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 Loucka 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 | #156,044 | #155,270 | 0.5% |
| Count | 104 | 101 | -2.9% |
| Per 100K | 0.04 | 0.03 | -15.5% |
Between the 2010 and 2020 Census, the number of Loucka bearers went from 104 to 101 (-2.9% change). The surname moved up 774 positions in the national ranking, going from #156,044 to #155,270.
FAQ
Loucka surname: questions and answers
How many people in the U.S. have the surname Loucka?
Name Census estimates that about 116 living Americans carry the surname Loucka. Using the current population baseline, that works out to roughly 1 in 2,954,779 residents.
How common is Loucka?
Loucka ranks #155,270 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 101 people with the surname Loucka. That is different from the site's living-bearer estimate (116), 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 Loucka.
Has Loucka become more or less common over time?
Between 2010 and 2020, the surname Loucka went from 104 recorded bearers to 101. That is a decrease of 3 (-2.9%). In the national ranking it rose from #156,044 to #155,270.
What does the Census say about the background of Loucka?
Among Census respondents with the surname Loucka, the largest self-reported group is White at 91.1%. The next largest groups are Hispanic (5.9%) and Black (2.0%). 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 Loucka in the 2020 Census, accounting for 91.1% (92 people in the source table).
What is the full ancestry breakdown?
Loucka appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (91.1%), Hispanic (5.9%), Black (2.0%). 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 Loucka (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 Loucka mean?
A surname derived from a Czech place name or meaning "meadow" or "pasture." 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 Loucka (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 common is the surname Loucka?
If you just want to know how many people have the surname Loucka, HowManyOfMe.org gives you the headline number in one glance.