2000
#139,757
National surname rank
Recorded bearers 110
First available Census row
Per 100,000 0.04
Very Rare Last name
Guasto
An Italian surname derived from the Italian word "guasto" meaning damage or spoiled.
According to the 2020 US Census Bureau surname tables, roughly 116 Americans carry the last name Guasto. 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 Guasto 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 Guasto 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 Guasto, the largest self-reported group is White at 100.0%.
Origin
Meaning and origin of Guasto
The surname Guasto originated in Italy during the medieval period. It is derived from the Italian word "guasto," which means "spoiled" or "ruined." The name was likely given as a nickname or descriptive name to someone who had a reputation for causing damage or spoiling things.
One of the earliest recorded instances of the name Guasto can be found in the historical records of the city of Florence, where a document from the 13th century mentions a certain "Guido Guasto." This suggests that the name was already in use by that time in the Tuscan region of Italy.
During the Renaissance period, the Guasto name appeared in several notable artistic and literary works. For instance, in Dante Alighieri's "Divine Comedy," written in the early 14th century, there is a reference to a character named "Guasto da Montefeltro," who was a famous military leader and strategist.
In the 15th century, a celebrated painter from the Venetian school of art, known as Jacopo del Guasto (1460-1528), gained fame for his exquisite portraiture and religious paintings. His works can be found in various churches and museums throughout Italy.
Another notable figure with the Guasto surname was Giovanni Battista Guasto (1542-1611), a renowned Italian architect and engineer who contributed to the design and construction of several historical buildings and fortifications in the city of Naples.
During the 16th century, the Guasto name also appeared in the context of Italian exploration and colonization. One of the earliest settlers in the Spanish colony of New Spain (present-day Mexico) was a man named Alonso Guasto, who arrived in the Americas in the 1540s and established a successful ranch in the region of Nuevo León.
As the centuries passed, the Guasto surname continued to be associated with various notable individuals in Italy and beyond. For example, in the 19th century, there was a famous Italian botanist named Giuseppe Guasto (1811-1883), who made significant contributions to the study and classification of plant species in the Mediterranean region.
Demographics
Ancestry and ethnicity for Guasto
Among Census respondents with the surname Guasto, the largest self-reported group is White at 100.0%.
The bar chart below shows how Guasto 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 Guasto surname at the time of the 2020 Census, not any inherent property of the name itself.
- White100.0% · 101
Timeline
Historical Census data for Guasto
Guasto 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
#158,432
National surname rank
Recorded bearers 102
-8 bearers (-7.3%)
Per 100,000 0.03
Rank movement Down 18,675 places
2020
#155,270
National surname rank
Recorded bearers 101
-1 bearers (-1.0%)
Per 100,000 0.03
Rank movement Up 3,162 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #139,757 | 110 | 0.04 | First available Census row | First available Census row |
| 2010 | #158,432 | 102 | 0.03 | -8 bearers (-7.3%) | Down 18,675 places |
| 2020 | #155,270 | 101 | 0.03 | -1 bearers (-1.0%) | Up 3,162 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 Guasto 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 | #158,432 | #155,270 | 2.0% |
| Count | 102 | 101 | -1.0% |
| Per 100K | 0.03 | 0.03 | 12.6% |
Between the 2010 and 2020 Census, the number of Guasto bearers went from 102 to 101 (-1.0% change). The surname moved up 3,162 positions in the national ranking, going from #158,432 to #155,270.
FAQ
Guasto surname: questions and answers
How many people in the U.S. have the surname Guasto?
Name Census estimates that about 116 living Americans carry the surname Guasto. Using the current population baseline, that works out to roughly 1 in 2,954,779 residents.
How common is Guasto?
Guasto 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 Guasto. 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 Guasto.
Has Guasto become more or less common over time?
Between 2010 and 2020, the surname Guasto went from 102 recorded bearers to 101. That is a decrease of 1 (-1.0%). In the national ranking it rose from #158,432 to #155,270.
What does the Census say about the background of Guasto?
Among Census respondents with the surname Guasto, the largest self-reported group is White at 100.0%. 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 Guasto in the 2020 Census, accounting for 100.0% (101 people in the source table).
What is the full ancestry breakdown?
Guasto appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (100.0%). 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 Guasto (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 Guasto mean?
An Italian surname derived from the Italian word "guasto" meaning damage or spoiled. 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 Guasto (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 people have the last name Guasto?
If you just want to know how many people are called Guasto, HowManyOfMe.org gives you the headline number in one glance.