Meriwether Lewis and William Clark passed through the South Sioux City area in 1804.

[5] European settlement on the Nebraska side of the river began as early as 1854.

[7] In contrast to its hilly larger neighbor, South Sioux City is relatively flat.

[8] As of the census[10] of 2010, there were 13,353 people, 4,512 households, and 3,139 families living in the city.

25.0% of all households were made up of individuals, and 10.4% had someone living alone who was 65 years of age or older.

As of the census of 2000, there were 11,925 people, 4,304 households, and 2,961 families living in the city.

25.6% of all households were made up of individuals, and 10.3% had someone living alone who was 65 years of age or older.

Employed residents traveled an average of 15.3 minutes to their jobs.

A smaller general-aviation airport, Martin Field (7K8), is located just west of South Sioux City along U.S. Route 20.