Hartford is a city in Sebastian County, Arkansas, United States. It is part of the Fort Smith, Arkansas-Oklahoma Metropolitan Statistical Area. The population was 642 at the 2010 census.
Hartford is located at 35°1′24″N 94°22′42″W / 35.02333°N 94.37833°W / 35.02333; -94.37833 (35.023358, -94.378398).
According to the United States Census Bureau, the city has a total area of 1.8 square miles (4.7 km2), all of it land.