John Mark Koch Biography
John Mark Koch is an American celebrity kid who was born and brought up in New York City, New York, United States of America. He is widely known as the son of youngest David Koch, a billionaire businessman and political activist, and Julia Margaret Flesher, a businesswoman and philanthropist. He was born in 1996 and is the youngest of three children.
John’s father David Koch, was a co-owner and chairman, along with Charles Koch, of Koch Industries, one of the world’s largest privately held companies. He has also been active as a political activist supporting libertarianism, and as of 2018, he is among the top 20 richest people in the world.
10 Facts About John Mark Koch
John Mark Koch Age
John is 27 years old as of 2023, he was born in 1996, in New York City, New York, United States. His birth sign is Virgo. His birthday is publicly not available. We will update this section once this information is available.
John Mark Koch Height
John stands at a height of 5 feet 8 inches (1.73 m).
John Mark Koch Weight
John Weighs 65 kg (143 lbs).
Early Life and Education
John was born in 1996 in New York City, New York. He is the son of David Koch, a billionaire businessman and political activist, and Julia Flesher Koch, a businesswoman and philanthropist. He has two older siblings, David Jr. and Mary Julia.
Koch attended St. David’s School, a private Episcopal school in New York City. He graduated in 2014 and went on to Yale University, where he is currently a student. Koch has not disclosed his major or year at Yale.
John Mark Koch Family, Parents
John was born to his parents David Koch and Julia Margaret Flesher in New York. David was an American businessman, philanthropist, political activist, and chemical engineer. His grandparents are Mary Clementine and Fred Chase Koch, a chemical engineer.
Although his paternal great grandfather, Harry Koch, was a Dutch immigrant who founded the Quanah Tribune-Chief newspaper and was a founding shareholder of Quanah, Acme, and Pacific Railway.
John has three uncles: Frederick R. Koch a collector and philanthropist, Charles Koch a businessman and political donor, and his father’s 19 minutes twin Bill Koch who is also a businessman, sailor, and collector.
John Mark Koch David Koch
John’s father David Koch joined the family business Koch Industries, the second-largest privately held company in the United States, in 1970. David became president of the subsidiary Koch Engineering in 1979.
David Koch was diagnosed with prostate cancer. David underwent radiation, surgery, and hormone therapy, but cancer returned every time. Koch said he believed his experience with cancer encouraged him to fund medical research Koch died on August 23, 2019, at the age of 79.
John Mark Koch Siblings
John has two siblings, an older sister Mary Julia Koch and an older brother David Koch Jr.
John Mark Koch Wife
John has not gone public with his relationship, it is not publicly known whether he is married or in a relationship. His partner’s information will be updated as soon as the information is available.
John Mark Koch Net Worth
John inherited a net worth of $50.5 billion from his father’s wealth. This includes his father’s assets, money, and income. His father’s primary source of income is his career as a businessman, political activist, philanthropist, and chemical engineer. Through his father’s various sources of income, Mark has been able to accumulate good fortune but prefers to lead a modest lifestyle.
John Mark Koch Measurements and Facts
Here are some interesting facts and body measurements you should know about John.
John Mark Koch Wiki

- Full Names: John Mark Koch
- Popular As: David Koch’s son
- Gender: Male
- Occupation / Profession: Celebrity Son
- Nationality: American
- Race / Ethnicity: White
- Religion: Not Known
- Sexual Orientation: Straight
John Mark Koch Birthday
- Age / How Old?: 27 years (2023)
- Zodiac Sign: Virgo
- Date of Birth: 1996
- Place of Birth: New York City, New York, USA
- Birthday: Not Known
John Mark Koch Body Measurements
- Body Measurements: Not Available
- Height / How Tall?: 5 feet 8 inches (1.73 m)
- Weight: 65 kg (143 lbs)
- Eye Color: Brown
- Hair Color: Brown
- Shoe Size: Not Available
John Mark Family and Relationship
- Father (Dad): David Koch
- Mother: Julia Margaret Flesher
- Siblings (Brothers and Sisters): Mary Julia Koch and David Koch Jr.
- Marital Status: Single
- Wife/Spouse: Not Applicable
- Dating / Girlfriend: Single
- Children: Sons (None) Daughter(s) (None)
John Mark Net Worth and Salary
- Net Worth: $50.5 Billion
- Salary: Under Review
- Source of Income: Father’s career as businessman, political activist, philanthropist, and chemical engineer
John Mark House and Cars
- Place of living: New York, New York, USA
- Cars: Car Brand to be Updated
John Mark Koch Career
John is still a student at Yale University, so he does not yet have a career. However, he is likely to pursue a career in business, as his father, David Koch, was a successful businessman.
Koch may also choose to follow in his father’s footsteps and become involved in politics. David Koch was a major donor to the Republican Party and to conservative think tanks. He also funded climate change denialism and other controversial causes.
It is not clear whether John shares his father’s political views. He has not made any public statements about his political beliefs. However, it is likely that he has been exposed to conservative ideas through his family upbringing.
Hobbies and Interests
- Name enjoys spending his free time engaging in activities that allow him to express his creativity and connect with others. He is passionate about using his hobbies to make a positive impact on the world.
- Name enjoys spending his free time learning new things and exploring new experiences. He is passionate about using his hobbies to expand his horizons and grow as a person.
- Name enjoys spending his free time relaxing and de-stressing. He is passionate about using his hobbies to take care of himself and maintain his mental and physical health.
Conclusion
John is a friend to us all. He is always there for us, no matter what. He is an inspiration to us all to be there for our friends and family, and to always show them how much we care.
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