There are 128 General Contractors in Marshall County, Iowa, serving a population of 40,476 people in an area of 573 square miles. There is 1 General Contractor per 316 people, and 1 General Contractor per 4 square miles.
In Iowa, Marshall County is ranked 51st of 99 counties in General Contractors per capita, and 20th of 99 counties in General Contractors per square mile.