Hartford is a city in Van Buren County in the U.S. state of Michigan. The population was 2,688 at the 2010 census. The city is located within H…Hartford is a city in Van Buren County in the U.S. state of Michigan. The population was 2,688 at the 2010 census. The city is located within Hartford Township, but is politically independent. According to the United States Census Bureau, the city has a total area of 1.34 square miles, of which 1.33 square miles is land and 0.01 square miles is water.