Hanover is a city in Washington County, Kansas, United States. As of the 2010 census, the city population was 682; as of 2014, it was estimated to have decreased to 665. It is the second most populous town within Washington County.The city is primarily agricultural, and the surrounding countryside is filled with small family farms. The Hanover area is also a popular destination for deer hunting. Named after Hanover, Germany, the town is a traditional German community with strong German cultural influences. The local area is home to numerous other German communities such as Hollenberg, Hermansburg, Frankfort, and Bremen.