There are 36 Martial Arts Instruction Classes in District of Columbia, serving a population of 672,391 people in an area of 62 square miles. There is 1 Martial Arts Instruction Class per 18,677 people, and 1 Martial Arts Instruction Class per 1 square miles.
The state of District of Columbia is ranked 13th in Martial Arts Instruction Classes per capita, and 1st in Martial Arts Instruction Classes per square mile.