Generally, there are many nationalities that are known for red hair. Among them, Scotland is one of the most well-known places for redheads. Ireland is another place that is known for its redheads. England is also a place where you can find many people with red hair. There are even festivals dedicated to celebrating red hair! Red hair is caused by a mutation in the MC1R gene. The mutation results in less melanin being produced. This causes the skin and hair to be lighter in color, including shades of red.