[1] Plymouth County, Iowa, was removed from the definition of the MSA prior to the 2020 census.

The Sioux City Human Rights Commission is an impartial governmental agency that works to protect the rights of the diverse population who live and work in Sioux City.

The Sioux City–Vermillion combined statistical area (CSA) is made up of five counties in three states: Iowa, Nebraska, and South Dakota.

Sioux City, Iowa has been featured in an Independent Lens series documenting bullying.

[5] The Sioux City metropolitan area is also featured in the book 100 Things to Do in Sioux City & Siouxland Before You Die by Lindsay Hindman (Reedy Press, Sept. 2020)[6]