Which was the poorest section of the US in 1920?

In 1920, the poorest section of the United States was largely the rural South, particularly the Appalachian region and parts of Mississippi and Alabama. This area faced economic challenges due to a reliance on agriculture, limited industrial development, and widespread poverty exacerbated by the effects of World War I. Additionally, systemic issues such as racial discrimination and lack of access to education further contributed to the economic struggles of its inhabitants.