2000
#133,114
National surname rank
Recorded bearers 117
First available Census row
Per 100,000 0.04
Very Rare Last name
Loudis
A variant spelling of the Greek surname Loudis, likely derived from the place name Loudias.
According to the 2020 US Census Bureau surname tables, roughly 123 Americans carry the last name Loudis. That puts it at #151,639 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,786,621 residents).
This page is the full Name Census profile for the Loudis 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
123
1 in 2,786,621
Census rank
#151,639
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
107
very rare in the US
Popularity narrative
The Census Bureau recorded 107 bearers of the surname Loudis in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 151639th position in the national surname ranking.
Among Census respondents with the surname Loudis, the largest self-reported group is White at 98.1%. The next largest groups are Hispanic (0.9%) and Asian/Pacific Islander (0.9%).
Origin
Meaning and origin of Loudis
The surname LOUDIS has its origins in northern France, dating back to the late 12th century. It is believed to be derived from the Old French word "loude," meaning loud or boisterous. This suggests that the name may have been initially given as a nickname to someone with a particularly loud or forceful demeanor.
One of the earliest recorded instances of the name appears in the Cartulaire de l'abbaye de Saint-Bertin, a medieval manuscript from the Abbey of Saint-Bertin in Saint-Omer, France. In this document, dated around 1190, a certain Jehan Loudis is mentioned as a landowner in the region.
By the 13th century, the name had spread to various parts of northern France, with variations in spelling such as Loudys, Loudicz, and Louditz appearing in historical records. One notable bearer of the name was Guillaume Loudis, a merchant from Arras who was involved in the trade of wool and textiles during the 1260s.
As the name continued to evolve over the centuries, it also found its way to other parts of Europe. In England, for instance, there are records of a John Loudis residing in Yorkshire in the late 14th century. Another notable figure was Robert Loudis, a Scottish clergyman who served as the Bishop of Dunkeld from 1465 to 1501.
In the 16th century, the name seems to have been particularly prevalent in the Low Countries, with several individuals bearing the surname LOUDIS playing important roles in the religious and political affairs of the region. One such person was Pieter Loudis, a Dutch Calvinist minister who was active in the Dutch Revolt against Spanish rule in the late 1500s.
Moving into the 17th century, the name appears to have gained a foothold in Germany, with the variant spelling Louditz being found in various records from that time. One notable bearer of this variation was Johann Louditz, a German composer and organist who lived between 1615 and 1683.
As the centuries progressed, the name continued to disperse across Europe and beyond, with individuals bearing the surname LOUDIS leaving their mark in various fields. One such figure was Louis Loudis, a French military officer who fought in the Napoleonic Wars and later served as a general in the French Army during the early 19th century.
Demographics
Ancestry and ethnicity for Loudis
Among Census respondents with the surname Loudis, the largest self-reported group is White at 98.1%. The next largest groups are Hispanic (0.9%) and Asian/Pacific Islander (0.9%).
The bar chart below shows how Loudis 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 Loudis surname at the time of the 2020 Census, not any inherent property of the name itself.
- White98.1% · 105
- Hispanic or Latino0.9% · 1
- Asian and Pacific Islander0.9% · 1
Timeline
Historical Census data for Loudis
Loudis 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
#150,452
National surname rank
Recorded bearers 109
-8 bearers (-6.8%)
Per 100,000 0.04
Rank movement Down 17,338 places
2020
#151,639
National surname rank
Recorded bearers 107
-2 bearers (-1.8%)
Per 100,000 0.04
Rank movement Down 1,187 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #133,114 | 117 | 0.04 | First available Census row | First available Census row |
| 2010 | #150,452 | 109 | 0.04 | -8 bearers (-6.8%) | Down 17,338 places |
| 2020 | #151,639 | 107 | 0.04 | -2 bearers (-1.8%) | Down 1,187 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 Loudis 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 | #150,452 | #151,639 | -0.8% |
| Count | 109 | 107 | -1.8% |
| Per 100K | 0.04 | 0.04 | -10.5% |
Between the 2010 and 2020 Census, the number of Loudis bearers went from 109 to 107 (-1.8% change). The surname moved down 1,187 positions in the national ranking, going from #150,452 to #151,639.
FAQ
Loudis surname: questions and answers
How many people in the U.S. have the surname Loudis?
Name Census estimates that about 123 living Americans carry the surname Loudis. Using the current population baseline, that works out to roughly 1 in 2,786,621 residents.
How common is Loudis?
Loudis ranks #151,639 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 107 people with the surname Loudis. That is different from the site's living-bearer estimate (123), 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 Loudis.
Has Loudis become more or less common over time?
Between 2010 and 2020, the surname Loudis went from 109 recorded bearers to 107. That is a decrease of 2 (-1.8%). In the national ranking it fell from #150,452 to #151,639.
What does the Census say about the background of Loudis?
Among Census respondents with the surname Loudis, the largest self-reported group is White at 98.1%. The next largest groups are Hispanic (0.9%) and Asian/Pacific Islander (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 Loudis in the 2020 Census, accounting for 98.1% (105 people in the source table).
What is the full ancestry breakdown?
Loudis appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (98.1%), Hispanic (0.9%), Asian/Pacific Islander (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 Loudis (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 Loudis mean?
A variant spelling of the Greek surname Loudis, likely derived from the place name Loudias. 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 Loudis (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 Loudis?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.