Hartford is a village in Madison County, Illinois, United States, on the Mississippi River near the mouth of the Missouri River. The population was 1,185 at the 2020 census, down from 1,429 in 2010. Lewis and Clark spent the winter of 1803-04 there, near what has been designated the Lewis and Clark State Historic Site. Geography Hartford is located in western Madison County at (38.824498, -90.092509). It is approximately north of downtown St. Louis, Missouri, and it is bordered to the west by the Mississippi River, across which are St. Charles County and St. Louis County, Missouri. The Missouri River joins the Mississippi across from the southwest corner of the village, about southwest of the village center. Lewis and Clark State Historic Site is within the village limits, directly across from the Missouri River confluence. Hartford is bordered to the north by the city of Wood River, to the east by the village of South Roxana, and to the south by Granite City. Illinois Route 3 passes through the west side of the village, leading northwest to Alton and south to East St. Louis. Illinois Route 111 runs along the eastern border of Hartford, leading north to the center of Wood River and south to Fairmont City. According to the U.S. Census Bureau, Hartford has a total area of , of which are land and , or 4.97%, are water. The Cahokia Creek Diversion Channel passes through the southern part of the village limits, reaching the Mississippi River at the Lewis and Clark Historic Site. Demographics As of the census of 2000, there were 1,545 people, 650 households, and 434 families residing in the village. The population density was . There were 710 housing units at an average density of . The racial makeup of the village was 98.45% White, 0.13% African American, 0.19% Native American, 0.32% Asian, 0.06% Pacific Islander, 0.32% from other races, and 0.52% from two or more races. Hispanic or Latino of any race were 0.71% of the population. There were 650 households, of which 27.8% had children under the age of 18 living with them, 52.9% were married couples living together, 11.1% had a female householder with no husband present, and 33.1% were non-families. 28.5% of all households were made up of individuals, and 13.8% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the