Emerson is a village in Dakota, Dixon, and Thurston counties in Nebraska, United States. The population was 840 at the 2010 census. Emerson is the only community in Nebraska that exists in three counties.

The Sioux City metropolitan statistical area, as defined by the United States Census Bureau, is an area consisting of four counties in three states – Iowa, Nebraska, and South Dakota, anchored by the city of Sioux City, Iowa. As of the 2020 census, the MSA had a population of 145,940. Plymouth County, Iowa, was removed from the definition of the MSA prior to the 2020 census.