There are 664 Martial Arts Instruction Classes in New Jersey, serving a population of 8,960,161 people in an area of 7,353 square miles. There is 1 Martial Arts Instruction Class per 13,494 people, and 1 Martial Arts Instruction Class per 11 square miles.
The state of New Jersey is ranked 4th in Martial Arts Instruction Classes per capita, and 2nd in Martial Arts Instruction Classes per square mile.