2010
#154,907
National surname rank
Recorded bearers 105
First available Census row
Per 100,000 0.04
Very Rare Last name
Lasonde
A French occupational surname meaning 'the sounder' or 'the lead weight maker'.
According to the 2020 US Census Bureau surname tables, roughly 120 Americans carry the last name Lasonde. That puts it at #152,989 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,856,286 residents).
This page is the full Name Census profile for the Lasonde 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
120
1 in 2,856,286
Census rank
#152,989
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
105
very rare in the US
Popularity narrative
The Census Bureau recorded 105 bearers of the surname Lasonde in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 152989th position in the national surname ranking.
Among Census respondents with the surname Lasonde, the largest self-reported group is White at 88.6%. The next largest groups are Black (7.6%) and Two or More Races (1.9%).
Origin
Meaning and origin of Lasonde
The surname LASONDE originated in France, with its earliest recorded usage dating back to the 16th century. It is believed to have derived from the Old French words "la sonde," which translates to "the probe" or "the sounding line," implying a connection to maritime occupations or locations near bodies of water.
One of the earliest documented references to the name LASONDE can be found in the records of the Normandy region of France, where it is recorded as a family name in the village of La Sonde in the mid-1500s. This village likely took its name from its proximity to a harbor or port, further reinforcing the name's nautical origins.
In the 17th century, records show the name LASONDE appearing in various parts of France, including Paris and the surrounding areas. This suggests that the family had begun to spread and establish itself in different regions of the country during this time period.
One notable individual bearing the LASONDE surname was Jean-Baptiste LASONDE, a French explorer and cartographer born in 1682. He is known for his extensive mapping of the Mississippi River and its tributaries, which played a significant role in the exploration and settlement of the American Midwest.
Another prominent figure was Marie-Françoise LASONDE, a French author and poet who lived from 1701 to 1783. Her works, which often explored themes of love and nature, were widely celebrated during her lifetime and have been preserved in several literary anthologies.
In the late 18th century, the LASONDE name found its way to the Canadian province of Quebec, likely brought by French settlers and immigrants. One of the earliest recorded instances of the name in Canada is that of Pierre LASONDE, a farmer and landowner born in 1776 in the region of Beauce, Quebec.
During the 19th century, the LASONDE surname continued to spread across Canada, with individuals bearing the name making notable contributions in various fields. For example, Louis LASONDE, born in 1842, was a prominent businessman and philanthropist who played a significant role in the development of the city of Montreal.
Another individual of note was Émilie LASONDE, a teacher and educational reformer who lived from 1865 to 1938. Her work in advocating for better educational opportunities for women and children in rural areas of Quebec was widely recognized and influenced educational policies of the time.
While the LASONDE surname has its roots in France and has maintained a strong presence in Canada over the centuries, it has also spread to other parts of the world through migration and immigration. However, the name's origins can be traced back to its maritime connotations in the coastal regions of France, where it first emerged as a distinct family name.
Demographics
Ancestry and ethnicity for Lasonde
Among Census respondents with the surname Lasonde, the largest self-reported group is White at 88.6%. The next largest groups are Black (7.6%) and Two or More Races (1.9%).
The bar chart below shows how Lasonde 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 Lasonde surname at the time of the 2020 Census, not any inherent property of the name itself.
- White88.6% · 93
- Black or African American7.6% · 8
- Two or more races1.9% · 2
- Asian and Pacific Islander1.0% · 1
- American Indian and Alaska Native1.0% · 1
Timeline
Historical Census data for Lasonde
Lasonde 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
#152,989
National surname rank
Recorded bearers 105
+0 bearers (+0.0%)
Per 100,000 0.04
Rank movement Up 1,918 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #154,907 | 105 | 0.04 | First available Census row | First available Census row |
| 2020 | #152,989 | 105 | 0.04 | +0 bearers (+0.0%) | Up 1,918 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 Lasonde 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 | #154,907 | #152,989 | 1.2% |
| Count | 105 | 105 | 0.0% |
| Per 100K | 0.04 | 0.04 | -12.2% |
Between the 2010 and 2020 Census, the number of Lasonde bearers went from 105 to 105 (+0.0% change). The surname moved up 1,918 positions in the national ranking, going from #154,907 to #152,989.
FAQ
Lasonde surname: questions and answers
How many people in the U.S. have the surname Lasonde?
Name Census estimates that about 120 living Americans carry the surname Lasonde. Using the current population baseline, that works out to roughly 1 in 2,856,286 residents.
How common is Lasonde?
Lasonde ranks #152,989 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 105 people with the surname Lasonde. That is different from the site's living-bearer estimate (120), 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 Lasonde.
Has Lasonde become more or less common over time?
Between 2010 and 2020, the surname Lasonde went from 105 recorded bearers to 105. That is an increase of 0 (+0.0%). In the national ranking it rose from #154,907 to #152,989.
What does the Census say about the background of Lasonde?
Among Census respondents with the surname Lasonde, the largest self-reported group is White at 88.6%. The next largest groups are Black (7.6%) and Two or More Races (1.9%). 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 Lasonde in the 2020 Census, accounting for 88.6% (93 people in the source table).
What is the full ancestry breakdown?
Lasonde appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (88.6%), Black (7.6%), Two or More Races (1.9%). 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 Lasonde (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 Lasonde mean?
A French occupational surname meaning 'the sounder' or 'the lead weight maker'. 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 Lasonde (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 Americans have the surname Lasonde?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.