I gave some reply after doing some quickly calculations. I used to live in the Seattle area and would see maybe one 7 feet tall person every 3 months. Now, that is a lot. Assuming that there was maybe 20 7 feet tall people and the total population of Washington was reported in the most recent US census beureau was about 7,000,000. then for every 350,000 people there is one 7 feet tall person which seems to be a reasonable guesstimate.
since there is about 7,000,000,000 people in the world, then we can just then multiple the 20 by 1000 giving us a total number of 7 feet tall people to be about 20,000 in the world.
However, height is a factor which is well modeled by a normalized distribution function with rather long tails on each end because of medical conditions and genetic abnormalities.
If we then wonder how many people then there are 8 feet tall or greater, we find that there is only 3 people currently that has been proven and measured. One of them is Sultan Kosen, which is the curent tallest person in the world.
1.Sultan Kosen (Turkey) – 8′ 3″
2. Brahim Takioullah (Morocco)- 8′ 1″
3. Morteza Mehrzad (Iran)- 8′ 0″ – 8′ 1″
Note: I wanted to thank the site thetallestman.com for providing me with much of the information I have used on this post. You can find their website HERE.
Oddly enough, it was only 3 years ago that an 8 feet person was even substainted in height. Before that, not one 8 foot tall person was alive for almost 40 years, at least claimed by the Guinness Book of Records.
Before that, the title of the tallest person in the world went to a Mongolian herdsman Bao Xi Shun, who was 7′ 9″. However, it was clear that he was not the tallest person in the world, or even in the billion population nation of China. The title probably would (and should) have gone to his fellow Chinese Zhang Jun- Cai , who had attended a Japanese show with Xi Shun many years ago and had both their heights measured with Jun-Cai’s height measured at least 2.25 inches (6 cm) bigger.
Some people have discussed and argued that under certain conditions and adjusting for spinal curvature, Zhang Jun-Cai should also be added to the 8 feet tall list. That would put the total number of people at an amazing 4