Determining the country that has produced the most professional skateboarders on a per capita basis is challenging because comprehensive statistics on professional skateboarders by nationality aren't readily available. Skateboarding is popular in many countries, and the number of professional skateboarders can vary greatly.
In the past, the United States has been a significant hub for professional skateboarders due to its large population and vibrant skateboarding culture. However, countries with smaller populations might have a higher per capita ratio of professional skateboarders. To get a precise answer, you would need access to specific data on the number of professional skateboarders by nationality, which is not widely documented