Most people on the planet are right-handed, so it’s easy to overlook what it can be like to be left-handed in a right-handed world. Over the years, researchers have explored the biological, psychological, and social effects of left-handedness, and some studies even discuss its possible evolutionary role.
Many people argue that left-handers often develop a more independent, adaptable mindset, largely because so many everyday tools and environments are built with right-handed users in mind. Historically, however, left-handedness has also been surrounded by superstition—at times even linked to the idea that the devil was left-handed, leading to unfair associations with witchcraft.
Even though lefties may still battle with right-handed scissors or learn to use right-oriented equipment, there are plenty of fascinating (and lesser-known) facts about left-handed people that deserve attention.
Interesting Facts About Left-Handed People
Left-handers are a distinctive minority, and their experiences come with some genuinely intriguing statistics and research findings. Below are 17 facts about lefties that many people don’t know.
1. Left-Handers Make Up About 12% of the Population
Globally, roughly:
- 12% of people are left-handed
- 87% are right-handed
- 1% are ambidextrous
In many places, the percentage of left-handed people has gradually risen as left-handedness becomes more accepted.
Even today, some countries and schools still pressure children to write with their right hand. Historically, this pressure was much stronger—around the 1860s, when left-handedness was heavily stigmatized, estimates suggest as little as 2% of people openly identified as left-handed.
Keep in mind that the modern 12% estimate varies by country and by gender.
2. There’s a National Left-Handers Day
August 13 is widely recognized as International (or National) Left-Handers Day. One key purpose is to spotlight the everyday frustrations lefties face in a world designed primarily for right-handers.
The celebration began in 1992 in the United Kingdom, launched by the Left-Handers Club.
3. Several Recent U.S. Presidents Have Been Left-Handed
In modern American history, a surprising number of presidents have been left-handed. Notable examples include:
- Gerald Ford
- Jimmy Carter
- Ronald Reagan
- George H. W. Bush
- Bill Clinton
- George W. Bush
- Barack Obama
- Donald Trump
- Joe Biden
4. Left-Handers May Process Language Differently Than Right-Handers
Some research suggests left-handers often show more mixed (heterogeneous) brain organization, meaning verbal processing may be distributed across both hemispheres more often than in right-handers.
By comparison, many right-handers show a more clearly divided pattern, where:
- the left hemisphere tends to dominate language
- the right hemisphere often focuses on visuospatial processing
Because left-handers may involve both sides of the brain in language tasks, some people interpret this as a potential advantage in handling larger amounts of information—though intelligence is complex and influenced by many factors.
5. Lefties May Regain Language More Easily After Some Strokes
Language problems are common when strokes affect the left side of the brain. About 95% of right-handed people have language mainly controlled by the left hemisphere, while estimates suggest only around 70% of left-handed people do.
Since left-handers are more likely to have language abilities distributed differently, a portion of them may be more likely to recover language function after certain strokes.
6. Left-Handed People May Be More Prone to Allergies
In the book “Cerebral Dominance: The Biological Foundations,” a study reported that left-handed individuals were far more likely to experience allergies than right-handed individuals.
The same source also suggested left-handers may have a higher likelihood of certain autoimmune disorders (for example, ulcerative colitis or rheumatoid arthritis).
7. Left-Handers Can Have an Edge in Certain Sports
Left-handed athletes may have a competitive advantage in sports where opponents are less used to facing left-dominant players, including:
- fencing
- boxing
- tennis
- baseball
- swimming
Because most players are right-handed, training and reflexes often develop around right-vs-right matchups. A left-handed opponent can disrupt timing and expectations. In tennis, this is often highlighted by the fact that a large share of top players have been left-handed.
8. Lefties May Experience Migraines More Often
The same body of research mentioned above also reported that left-handed people may be about twice as likely to experience migraines compared with right-handed people.
9. Left-Handers May Perform Better When Multitasking
Data collected in 2008 by the Illinois Research Consortium suggested that left- and right-handed people can approach memory and task performance differently.
In experiments where participants were asked to perform two tasks at the same time, left-handed participants tended to perform better.
One explanation often given is style of problem-solving:
- Right-handers may more often break problems into smaller parts and solve step-by-step
- Left-handers may more often view problems as a whole and use pattern recognition
10. Left-Handers Are Often Linked with Creativity
Left-handedness is frequently associated with art, creativity, and imagination, partly because of how the brain’s hemispheres are commonly described in popular science.
Left-handers are also sometimes described as leaning more toward visual information rather than language-first processing—though individual differences are always significant.
11. Left-Handed People May Be More Affected by Sleep Disruption
Some evidence suggests left-handedness may be linked with a higher rate of sleep issues involving movement. Periodic Limb Movement Disorder (PLMD) causes involuntary limb movements during sleep.
A 2011 study titled “Assessment of Periodic Limb Movements in Right-handed Versus Left-handed Patients” found bilateral limb movements in:
- 69% of right-handed participants
- 94% of left-handed participants
So if you move a lot in your sleep, handedness might be one factor researchers have explored.
12. Left-Handed People Often Use the Right Side of the Brain More—But It’s Complicated
The brain is often described as cross-wired, meaning:
- the right hemisphere primarily controls the left side of the body
- the left hemisphere primarily controls the right side
This idea is sometimes summed up in the saying that left-handed people are “in their right mind,” referring to right-hemisphere involvement in controlling the dominant hand and traits often linked to creativity.
However, a 2018 study from Washington University (“Unilateral, 3D Arm Movement Kinematics Are Encoded in Ipsilateral Human Cortex”) suggested movement tasks may be shared more evenly across the brain than people often assume. The researchers also emphasized that the study involved only four patients, so more research is needed.
13. There’s a Name for Fear of Left-Sided Things
A fear of left-sided things—including left-handed people—exists and is known as sinistrophobia.
14. Left-Handers May Be Less Likely to Roll Their Tongues
Yes, this has been studied. One study reported differences in tongue-rolling ability:
- 62.8% of left-handers could roll their tongues
- 74.8% of right-handers could do it
15. Left-Handedness Has Had a “Sinister” Reputation in History
Across many cultures, left-handedness has been viewed negatively—described as unlucky, weak, corrupt, or even evil. The word “sinister” comes from the Latin “sinister,” meaning “left.”
16. Puberty “Later by 4–5 Months” Is Often Claimed, But Not Well Supported
You may have seen claims that left-handed people reach puberty 4–5 months later than right-handed people. This is widely repeated online, but strong sourcing is difficult to confirm. It’s best treated as unproven unless supported by reliable research.
17. The “Left-Handers Live 9 Years Less” Claim Was Debunked
A popular internet myth says left-handed people live nine years less than right-handed people. Later analysis showed this claim was not reliable.
It traces back to a flawed study from the 1980s that examined around 1,000 deceased people in California. The results were influenced by methodological issues (including how older generations were more likely to have been pressured into identifying as right-handed), which distorted the outcome. Subsequent research did not support a large life-expectancy gap based on handedness.
