理查森县（Richardson County, Nebraska）是美国内布拉斯加州东南角的一个县，南邻堪萨斯州，东隔密苏里河与密苏里州相望。面积1,433平方公里。根据美国2000年人口普查，共有人口9,531。县治福尔斯城 （Falls City）。

成立于1854年11月23日。县名纪念联邦众议员、参议员 （代表伊利诺伊州）、内布拉斯加准州州长威廉·亚历山大·理查森。

Richardson County is a county located in the U.S. state of Nebraska. As of the 2010 census, the population was 8,363. Its county seat is Falls City.

In the Nebraska license plate system, Richardson County is represented by the prefix 19 (it had the nineteenth-largest number of vehicles registered in the county when the license plate system was established in 1922). Part of the Iowa Reservation of Kansas and Nebraska is located in the southeast corner of the county.