Hanover is a city in Washington County, Kansas, United States. The population was 653 at the 2000 census.
Hanover is located at 39°53′27″N 96°52′31″W / 39.89083°N 96.87528°W / 39.89083; -96.87528 (39.890836, -96.875348). According to the United States Census Bureau, the city has a total area of 0.5 square miles (1.3 km²), all of it land.
As of the census of 2000, there were 653 people, 283 households, and 170 families residing in the city. The population density was 1,298.7 people per square mile (504.2/km²). There were 332 housing units at an average density of 660.3 per square mile (256.4/km²). The racial makeup of the city was 98.32% White, 0.61% African American, 0.46% Native American, and 0.61% from two or more races. Hispanic or Latino of any race were 0.46% of the population.