New Hampton is a city in southwest Harrison County, Missouri, United States.

[6] According to the United States Census Bureau, the city has a total area of 0.55 square miles (1.42 km2), all land.

There were 153 housing units at an average density of 278.2 per square mile (107.4/km2).

The racial makup of the city was 95.5% White, 1.7% Native American, and 2.7% from two or more races.

At the 2000 census there were 349 people in 142 households, including 92 families, in the city.

There were 170 housing units at an average density of 244.2 per square mile (94.3/km2).