Before the New Haven vicinity was settled, it was inhabited by multiple indigenous cultures. Some countryside southeast of the village near the Wabash was formerly the location of a village of a Late Woodland people known as the "Duffy Complex"; the location is now an archaeological site known as the Duffy Site.
Geography
New Haven is located in the northeast corner of Gallatin County at . It is bordered to the north by White County, and the Little Wabash River forms part of the northern border. Illinois Route 141 passes through the northern part of the village, leading east to the Indiana border at the Wabash River and to Mount Vernon, Indiana, and west to U.S. Route 45 northwest of Omaha, Illinois. Shawneetown, the Gallatin County seat, is to the south. According to the 2010 census, New Haven has a total area of, of which is land and is water.
Demographics
At the 2000 census, there were 477 people, 203 households and 138 families residing in the village. The population density was 395.7 per square mile. There were 240 housing units at an average density of 199.1 per square mile. The racial makeup of the village was 99.58% White, and 0.42% from two or more races. Hispanic or Latino of any race were 1.05% of the population. There were 203 households of which 28.1% had children under the age of 18 living with them, 54.7% were married couplesliving together, 11.3% had a female householder with no husband present, and 32.0% were non-families. 27.6% of all households were made up of individuals and 10.3% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.90. 23.1% of the population were under the age of 18, 8.0% from 18 to 24, 23.9% from 25 to 44, 28.5% from 45 to 64, and 16.6% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 97.9 males. For every 100 females age 18 and over, there were 90.2 males. The median household income was $27,083 and the median family income was $29,875. Males had a median income of $25,000 and females $19,500. The per capita income was $12,367. About 20.3% of families and 22.6% of the population were below the poverty line, including 24.8% of those under age 18 and 11.3% of those age 65 or over.
