Hartford is a city in Dodge and Washington counties in the U.S. state of Wisconsin. As of the 2020 census, the city had a population of 16,00…Hartford is a city in Dodge and Washington counties in the U.S. state of Wisconsin. As of the 2020 census, the city had a population of 16,000. All of this population resided in the Washington County portion of the city. The portion of the city in Dodge County consists of only industrial/commercial parcels. Located approximately 38 miles northwest of Downtown Milwaukee and 22 miles from city limits, Hartford is located on the outer edge of the Milwaukee metropolitan area.