2000
#137,816
National surname rank
Recorded bearers 112
First available Census row
Per 100,000 0.04
Very Rare Last name
Demedio
A Spanish surname meaning "the middle" or "midway".
According to the 2020 US Census Bureau surname tables, roughly 116 Americans carry the last name Demedio. 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 Demedio 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 Demedio 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 Demedio, the largest self-reported group is White at 75.2%. The next largest groups are Hispanic (13.9%) and Two or More Races (5.9%).
Origin
Meaning and origin of Demedio
The surname DEMEDIO has its origins in Italy, dating back to the 13th century. It is derived from the Italian phrase "de medio," which translates to "from the middle" or "from the midst." This suggests that the name may have initially been used to identify individuals who lived or worked in a central location within a town or village.
One of the earliest recorded instances of the name DEMEDIO can be found in the Florentine Codice Diplomatico, a collection of medieval documents from Florence, Italy. In this compilation, there is a reference to a certain "Iohannes de Medio" in the year 1285.
During the Renaissance period, the DEMEDIO name appeared in various Italian manuscripts and records. Notably, a Giovanni DEMEDIO was mentioned as a prominent merchant and banker in Venice during the 15th century.
In the 17th century, the DEMEDIO family established a presence in the region of Tuscany, particularly in the town of Siena. Records from this time period show that a Francesco DEMEDIO (1620-1685) was a respected lawyer and judge in the city.
Another notable individual with the DEMEDIO surname was Giacomo DEMEDIO (1745-1818), a renowned architect from Milan. He is credited with designing several notable buildings, including the Chiesa di Santa Maria Incoronata.
The DEMEDIO name also has ties to the world of literature. In the 19th century, a poet and writer named Alessandro DEMEDIO (1825-1892) gained recognition for his works, which often celebrated the beauty and culture of his native Italy.
As the DEMEDIO family spread across different regions of Italy over the centuries, variations in the spelling of the name emerged. Some alternative spellings included De Medio, DeMedio, and Demidio.
While the surname DEMEDIO is not among the most common Italian surnames, it has a rich history that spans several centuries and can be traced back to its origins in the heart of medieval Italy.
Demographics
Ancestry and ethnicity for Demedio
Among Census respondents with the surname Demedio, the largest self-reported group is White at 75.2%. The next largest groups are Hispanic (13.9%) and Two or More Races (5.9%).
The bar chart below shows how Demedio 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 Demedio surname at the time of the 2020 Census, not any inherent property of the name itself.
- White75.2% · 76
- Hispanic or Latino13.9% · 14
- Two or more races5.9% · 6
- Black or African American2.0% · 2
- Asian and Pacific Islander2.0% · 2
- American Indian and Alaska Native1.0% · 1
Timeline
Historical Census data for Demedio
Demedio 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
#156,044
National surname rank
Recorded bearers 104
-8 bearers (-7.1%)
Per 100,000 0.04
Rank movement Down 18,228 places
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 |
|---|---|---|---|---|---|
| 2000 | #137,816 | 112 | 0.04 | First available Census row | First available Census row |
| 2010 | #156,044 | 104 | 0.04 | -8 bearers (-7.1%) | Down 18,228 places |
| 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 Demedio 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 Demedio 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
Demedio surname: questions and answers
How many people in the U.S. have the surname Demedio?
Name Census estimates that about 116 living Americans carry the surname Demedio. Using the current population baseline, that works out to roughly 1 in 2,954,779 residents.
How common is Demedio?
Demedio 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 Demedio. 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 Demedio.
Has Demedio become more or less common over time?
Between 2010 and 2020, the surname Demedio 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 Demedio?
Among Census respondents with the surname Demedio, the largest self-reported group is White at 75.2%. The next largest groups are Hispanic (13.9%) and Two or More Races (5.9%). 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 Demedio in the 2020 Census, accounting for 75.2% (76 people in the source table).
What is the full ancestry breakdown?
Demedio appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (75.2%), Hispanic (13.9%), Two or More Races (5.9%). 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 Demedio (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 Demedio mean?
A Spanish surname meaning "the middle" or "midway". 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 Demedio (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 Demedio?
Want to know how many people have the last name Demedio? HowManyOfMe.org, our sister site, puts the living-bearer count front and centre.