Historians have found that land claims on the New Haven area were filed in two counties on the same day. Jonathan filed a claim in Gallatin County and Joseph in White County. The reason they were so careful was that Daniel Boone had lost his land in Kentucky because of a faulty entry of his land holdings. The precaution of double-filing was necessary because the boundary between the two counties was in dispute. This border dispute was not settled until 1847.
New Haven is the third oldest English-speaking town in Illinois.
The Graddy Hotel is located in New Haven. It was built in 1859. This memorial reminds us to remember the people who served in the military. New Haven school was closed in 1973. The students now attend Gallatin County school.