The collection consists of organizational records from 1946-1980, as well as state and national materials. Also included are financial records, the League's work on education, water and environmental issues, foreign policy materials, local state and national government issues, including voter service materials. There are also materials on other subjects with which the League has been involved and various printed materials.

Clippings concerning the business activities of Potter P. Howard in Boise, Idaho, and Boise's growth during his two terms as mayor, 1947-1951.